70Mai Dash Cam Pro review

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70mai dashcam 02REVIEW – Dashcams are used to record outrageous occurrences on the road or provide evidence of collision, vandalism, or corruption. However, only Tesla has a built-in dashcam; in other cars, the dashcam is purchased separately. The 70Mai Dash Cam Pro is one of the newest models to hit the market. Read on to see what I think!

What is it?

A dashcam is a small digital video camera that mounts to the dashboard and records the point of view of the driver. Each country and jurisdiction within the country has rules about the use of dashcams and the distribution of the videos that they record, so users must ensure their legal right to operate the camera.  These legal restrictions are one of the reasons that automakers generally do not incorporate them. The benefit to these restrictions is that dashcam manufacturers can rapidly develop features outside of the snail’s pace of evolution that automakers are restricted to.  As a result, consumers and manufacturers are no longer satisfied with a dashcam as merely a windshield mounted HD wide-angle camera that can store video to a microSD card. As part of this trend, the 70Mai Dash Cam Pro has some very innovative design and features and is an example of the rapid evolution of the dashcam.

What’s in the box?

  • 70mai Smart Dash Cam Pro
  • Car Charger
  • USB Cable
  • Two Electrostatic stickers
  • Wiring tool
  • mounting bracket with heat resistant adhesive
  • manual

Hardware specs

  • Model: Midrive D02
  • Image sensor: SONY IMX335
  • Resolution: 2592 x 1944
  • Camera: FOV 140° , F1.8, 6 glass
  • Wireless connection: Wi-Fi IEEE 802.11 b/g/n/ 2.4GHz
  • G-sensor: Acceleration sensor
  • Expandable memory: MicroSD card with a capacity of 16-64GB and read/write speed of Class10 and above
  • Supported OS: Android4.4/iOS8.0 and above
  • Power supply: car cigarette lighter
  • Battery type: li-polymer battery
  • Battery capacity: 500mAh
  • Input: 5V 2A
  • Operating temperature:-10C 60C
  • Dimensions: 82 x 58.2 x 40.5mm

Design and features

first thoughts

The physical design of the dash cam is very sleek and unobtrusive. This is the first camera that I have seen that supports mounting using an electrostatic film. This is similar to that film that is applied to glass phone screen protectors. Once the film has bonded to the windshield it is held securely in place but may be removed by peeling back one edge without leaving any residue. or film. This design allows the film to be freely repositioned without leaving traces of adhesive. This also permits the camera to be used on rented or other short term vehicle and then returned to the main vehicle. You can see the oval film in the photo below.

70mai dashcam 19

The camera mounts to the windshield so that the LCD display and buttons for the user interface are mounted in a fixed position against the windshield. This is a great option for a vast majority of vehicles but may be difficult to access for some vans or cars that have large windshields mounted at a low angle.

70mai dashcam 01


The camera is on the left-hand side and the USB cord is on the right-hand side. I would expect that since more cars are left side drive that the camera would be on the right-hand side so that the camera could be mounted center with the screen and buttons closer to the driver. The camera mount has an indicator light designed to alert the driver so a left side drive was definitely the target platform when the camera was designed. The camera is mounted on a rotating bezel so that the most use of the field of view can be obtained. The camera does not have any left to right adjustment, so the unit must be mounted in the center of the windshield to obtain the best results.

The review sample of the dashcam was provided with an accessory GPS mount holder that has an adhesive on it and is used to mount the camera to the electrostatic sticker. If the GPS mount is not purchased then a standard mount is provided. The mount allows quick connection and disconnection from the windshield without removing the electrostatic sticker. It also has small rubber feet so that it acts as a shock absorber for recording. The camera doesn’t have any built-in image stabilization so a little help from these rubber feet goes a long way.

Once the camera is mounted it looks very sharp and more like a built-in piece of the car versus an accessory stuck on the windshield. The USB power cable is very long, about 10.5 feet, and should allow inconspicuous mounting of the camera cable in a variety of cars. Owners should be careful to not block the operation of airbags. If you are able to remove the A-pillar faring and tie the wire to the other cables running in this area then that is best.


The instruction booklet is in the English language and gives a brief overview of the use. In addition, the camera and electrostatic mounts each come with screen protectors printed with instructive text. The camera screen protector indicates the function buttons and that the unit may be reset by holding the power button for 15 seconds. The electrostatic film protector describes the instructions for mounting the film and camera. The camera also provides some information upon the first use, but there is no way to revisit this information from a help submenu. The gallery below shows what it is like.

The website at the beginning of the book,  https://help.70mai.asia/278.html, is quite helpful and provides much more information than the booklet shipped with the camera.  Specifically, the website describes the voice control capabilities, the P vs N setting (PAL vs NTSC), the limited number of photos (100), and other items not mentioned in the booklet. (I suddenly long for the hundreds of pages that Microsoft Ofice included in the early ’90s.) One thing I couldn’t find any info on was what the 12V adapter said. The text is very hard to read amber on black and it is in Chinese. Good thing Google translate knows that this says “Dedicated power supply port.”70mai dashcam 18

You will need to supply your own microSD card for the camera. The manual recommends a card that is 16 to 64 GB but I used a 128 GB card without issue and it was able to access the whole capacity. The camera records video in one-minute intervals and will delete the oldest video when the capacity of the memory card is nearly exhausted. The card capacity relates to how many minutes of driving record you wish to keep.  The card must be formatted in the camera and will have four directories of video storage: Normal video which is the looped record of the drive, Emergency video which is triggered by a hard acceleration during driving, Parking video which is triggered by the movement of the accelerometer after power is cut off, and photo storage. I was surprised to read that the emergency video is also looped. I would think that these videos should be persistent until the storage of the card is full.  The recordings are constant bit rate and each video has an audio track even when the audio is not recorded. The audio on silent clips is 1 minute of constant bit rate mono 44kHz 24bit sample.

The camera is able to record video in 4 different resolutions. The higher resolutions are recorded in H.265, which may not be supported natively on all devices and the lower resolutions are recorded in H.264. Each video segment also has a preview video in 640×360 that is downloaded to the mobile app for preview. The total capacity for each video is identified in the table below.

resolution (pixels) codec Frame rate (1/sec) file size (KB)
2592×1944 H.265 30 163840
2560×1440 H.265 30 163840
1920×1080 H.265 30 122880
1920×1080 H.264 30 122880
1280×720 H.264 30 122880
640×360 H.264 30 20480

Photos are taken at the resolution that the camera is operating at. Each photo was stored in a 5 MB file. Even the highest resolution photo shouldn’t be more than 2 MB.

It seems based on this table that the incremental difference in the capacity required for higher resolutions is small based on the compression used and the way that video is stored on the card.  Apparently, the 128GB card I used was formatted with a 5120 MB cluster size.  I also tried a 32 GB card and it was formatted in the same way. The card is readable by a PC or Mac using an adapter.

The operation of the camera is menu driven. I think that some menu items are in the wrong place, but here is the layout.

The camera app allows you to manage all of the 70mai gadgets. The app has a local album of videos and photos that you download to the app. The app also has the same info presented on the web page above. The app settings allow you to clear the app cache and provide feedback to 70mai. The main screen of the app is a preview window of the camera feed and allows the user to take a photo using a button on the app. The app pairs with the camera using a WI-FI access point.

70mai dashcam 14

Once the power is cut to the camera the camera will remain on standby. if there is any movement detected by the camera in this state it will record a video. The camera also records a video while the car is moving if there is sudden acceleration.

A de-fog algorithm sharpens video taken in snow, smoke or haze but without a way to turn it off, I was unsure how well it works.

There is an optional GPS module that replaces the camera’s mount. The GPS mount enables a feature called Advanced Driver Assistance System, which gives real-time alerts when your car is leaving its lane or rapidly approaching a vehicle ahead. This feature didn’t work as well as my car’s built-in system. What I find frustrating is that the GPS isn’t used to EXIF tag the photos, label the files of the video or set the camera’s time. These should be minor programming changes that could have a profound benefit to understanding what happened on the road and when. One other item is that the operation is restricted to between 14 and 140 degF. Car’s interiors often reach conditions outside of this range and I’m not sure that the parking monitor will work in these extreme conditions.


I’ve included a few videos of the performance at the links below. Overall the videos are clear. I think that the enhancement that the advertisement shows is more like CSI than reality, but license plates are visible and readable.

This is the manufacturer’s video:

This is my video taken during the day at the highest resolution. The sun is setting to the left of the video but the glare doesn’t wash out the rest of the scene. I bet the couple who got in a collision had one of these cameras.

Here is another video that I captured taken at night. It is impressive how the sensor compensates when the headlights are turned off. It is actually brighter on the video display than it is through the windshield.

The images of my garage below show the different resolutions available. I added the resolution text but everything else is standard and not configurable.

What I like

  • Design
  • User interface (both verbal and button based)
  • App

What needs to be improved

  • ADAS implementation
  • GPS integration
  • Extreme weather operation
  • It is a bit difficult to get the microSD card in and out

Final thoughts

Ideally, the dashcam is the gadget that you won’t know you have until you really need it. This unit’s small size, easy function, and affordable price mean it won’t take up room in your car or burn a hole in your wallet.

Price: $75.97
Where to buy: Amazon and AliExpress
Source: The sample of this product was provided by 70mai.

45 thoughts on “70Mai Dash Cam Pro review”

  1. Gadgeteer Comment Policy - Please read before commenting
  2. hi i have just got a new 70 mai pro. Yet to install it. Is heating really an issue. I live in Delhi, India and temperatures hover around 45 Degree Cel during summers and during winters also sunlight may fall directly on it. Will it be able to keep up with the sun. Thanks.

    1. The Camera operating temperature is from -10°C to about 60°C so the unit should operate in the summer month conditions in Delhi. Even in the US the inside of a car can reach 45°C. The issue I think you may have is the temperature inside the car if the outside is 45°C. Maybe you may need to keep the window open a crack, shade the windscreen, or invest in a solar car fan. Let us know how it works!

      1. Thanks Howard for the valuable info. These small things are never mentioned elaborately in the user manual. Yes I will try what you said. I can just take out the cam when not in use and put it in the glove box. The attachment does have that option which I came to know about later. Thanks again and this blog is a really cool effort.

  3. Your review was spot on! Well done! My biggest complaint is the current lack of integration of the GPS, which you did address. Latest firmware, 1.0.5na, has helped but it is still not competitive with the competition.

    1. It’s true, The most requested features for the 70mai finally came out! You can now see the real-time speed and GPS location on 70mai Dash Cam Pro videos, after updating the dash cam firmware to Version 1.0.5. However, the speed and GPS coordinates are only available in 70mai APP album or when you replay the video directly on the device. (Downloaded video does not display such information for now)

      70mai team are still working on improvements to make everything smoother. If you’d like to talk with 70mai about any ideas or suggestions, please join the 70mai Community here.

  4. When using voice commands to record video, after giving the voice command does the video start immediately with the voice command or does it start something like 15 seconds before?

    1. The record video command adds 30 seconds to the video being recorded and saves it in a special event folder. The video in the process of being recorded can range from 1 to 60 seconds, so the total video length is 31 to 90 seconds.

      1. Hey there realy liked the review and the fact that the videos are uploaded in the proper resolution but you did run a stop sign and still uploaded the video….had quite a laugh about that 😀

  5. Is this DVR support more than one mobile phone device. I tried added 2nd device smartphone for my wife mobile phone. When I use my own mobile phone to connect wifi to DVR. It complain but the not added device & keep voice beeping until can’t function. After remove the power supply & reconnect back the 70mai DVR. I needed to add again the device

  6. The device seems to be locking the SD cards, and they can’t be formatted by the device, or on my pc. I have tried three cards, and all three are now unusable.
    Any thoughts?

    1. Hi Bill,
      I am also facing same issue, the message displayed is “sd card write protected” if any one know the fix please let us know, as my second card 32gb and 64gb are useless now.

      1. Some SD cards may do this when their lifespan has been exceeded. Since dash cameras repeatedly write on the SD card, and many SD cards are not designed for this kind of repeated write load, they may reach the end of their lifespan quickly.

        1. any SD card can work this way. Not a card make a changes and decisions what to write and what to delete mate. Its actual processor in the cam doing that so, you can use any SD card. Unless maybe some cheap chinese sd card might be not compatible, but again that would be sd card manufacturer issue 🙂

    2. Hi
      My issue is I can access all videos when I sit in car and camera is on no problem. When I switched off car come inside house, I can’t load camera on app, keeps circling and in the end message come need manualy setup. Have I missed some on settings or it’s like that, please advise

  7. I currently live in Canada where temperatures can drop up to -45 degrees C during winter months. I was wondering if the dashcam would function properly under such extreme conditions?

    1. I don’t think the camera will work so well in -45C weather. Another reader lives in Dehli where the temperatures reach 45C. You two should meet about midway in Portugal where the weather is nicer. 🙂

  8. Thank you for letting us know about 128GB card support. I have purchased 64GB Transcend Endurance card, so far it has been working without a hitch. If I have known, I might have gone with 128GB size.

  9. It is really normal that the video looped every 1 minute? Is there a way to continuesly records without looping every minute? Thanks

  10. Hello Howard,

    Thanks for the review, very informative.

    Does the camera stay in standby mode until it senses that you’ve stated driving (auto recording) or do you need to start active recording when you drive off?

    Most Dashcams have this feature but I can’t seem to find this detail on any product or review of this dashcam.


    1. The camera has a parking surveillance mode that activates once the mains power is cut. When operating in this manner, when the car encounters a collision while parked, the device will automatically record a parking monitoring video. This mode will be in effect as long as the internal battery has power. Videos recorded in this mode are each 1 minute long, stored in the normal video library and have a “P” graphic on the video recording. If temperature inside the car is lower than -10°C or higher than 60°C the parking surveillance will not function without an external power supply.

  11. Charith Baddage

    Hi, My Mai70 pro works well and even i can see the gps cordinates and speed in recorded videos.
    But, i have not received any warnings on collision detection or lane departure. Why is this? I have activated all settings and calibrated.

    1. Charith, I would try recalibrating the auto lane departure system again on a straight road that is well lit but not too much glare. A cloudy day may be best. Also, I would as that while you are parked to give the camera a whack with your hand and see if the crash detection works. Good Luck!

      1. Thank you very much, it worked after I tried in a cloudy day and now working in all conditions. Will the battery get damaged when i parked outside under the sun. The normal temperature here is approx 30 Celcius in the day. Can the battery be replaced easily if damaged?

        1. You need to have the wifi on the camera enabled. I have only used the wifi in the car; I have not tested the range anywhere else. I feel that the wifi is used because Bluetooth is too slow not because it provides larger range. The wifi in your house may also be broadcasting on a competing channel and frequency.

    1. Stan, the camera can rotate about 60° so it can be used on just about any windshield, but does not rotate to face the passengers

  12. Recently I bought this CAM. I installed the 70mai app in car android player. But In car android 9 I can’t access video album in dash cam micro SD like app working in phone. do you have any idea about it?

  13. I want to record lower resolutions like 1080p because of storage and also many device don’t support 2K. But which codec and fps should I use for better quality. Do you have any experience about the most appropriate video resolution

    1. In my review I provide the storage requirements for a number of different frame rates and resolutions. You’ll see that recording at 2k vs 3.6k doesn’t provide as much savings as you would imagine. Recording at 60% of the resolution requires 75% of the storage capacity of the highest quality recording. I remember spending $250 on a 200 MB hard drive so my bias is that memory is really cheap and instead of using a smaller file size you should spring for the extra gigabytes.

  14. Hi. What are the features for the SD card 128 gb compatible with the dash cam? Is class 10 will do or U3 is required too? Or there is any other features?

  15. Hi Howard,
    This info still holds good in 2021, to my surprise this is the only review which I came across which clarifies on H265 codec, does the codec change once we download the file on phone?
    I live in Bangalore, India and Summer temperatures here can go up to 38C during a very hot day, so is it advisable to go for lithium battery based dashcam ? or Super Capacitor based like DDPAI, any thoughts on DDPAI Mola N3 Dashcam?

    1. Howard Sneider

      The swivel on the camera does not allow it to face into the vehicle so this is not possible with this model.
      Other manufacturers and models support in car recording, especially for ridesharing, so that a recording of all driving activites is made.

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