KAIWEETS HT100 Non-Contact Voltage Tester Pen and KAIWEETS VT500 Voltage Tester/ 12V-300V Non-Contact and Contact Voltage Pen with NCV review

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REVIEW – I have spent the better part of the past 2 years working to resolve electrical issues in the home I purchased and to upgrade to new outlets, etc. With the cost of professional labor, there are some DIY projects that can be done to save quite a bit of $$$. When working with electricity, it is very important to be aware of the presence of a live circuit, and in some cases to determine the voltage. Having a simple and handy tester to confirm the presence of electricity and the voltage, is par for the course. In this review, I get the opportunity to test the Kaiweets VT500 Voltage Tester, and the Kaiweets HT100 Voltage Detector.

What is it?

The Kaiweets VT500 and HT100 are voltage/continuity testers that allow the user to detect the presence of voltage in a circuit and with the VT500 the actual amount of voltage present.

What’s in the box?

Box 1:

  • 1 x Kaiweets VT500 Voltage Tester
  • 1 x User Manual

Box 2:

  • 1 x Kaiweets HT100 Voltage Tester
  • 1 x User Manual

Hardware specs



Design and features


    • SAFETY FIRST: It will send out multiple alarms through sound and light. When the voltage is detected, the tip will send out red light and beep. When the higher the sensed voltage is, or the closer it is to the voltage source, it beeps at a higher frequency. At the same time, the screen will be red or green, red means that high voltage and live wire are detected, and green means that low voltage and null wire are detected.
    • NON-CONTACT: With NCV inductive probe for AC voltage; Just place the tip near a terminal strip, outlet, or supply cord. When the tip glows red and the pen beeps, you know there’s voltage present. The live wire detector can automatically detect the live or neutral wire. Ideal for breakpoint Tests. Handy circuit tester for electricians, and homeowners.
    • DUAL-RANGE: Detects standard and low voltage (12-1000V AC / 48-1000V AC) for more sensitive and flexible measurements. Press the S button to adjust sensitivity and adapt low range for doorbells, thermostats, irrigation wiring, etc.; The NCV sensor automatically recognizes the voltage and displays it on the bar graph.
    • SECURITY LEVEL: IEC-rated CAT III 1000V CAT IV 600V, Meets CE requirements; The electrical tester is safely double insulated. High Voltage Alert to warn you of voltage above 90V, the screen turn red and the safety symbol on the screen shines.
    • COMPACT DESIGN: Bright LED flashlight for work in dark areas; Low-Power-Indicator when battery voltage is below 2.5V; Automatic Power Off after 3 minutes without operation or signal detection; Pocket-sized, pen hook allows you to carry it in your shirt pocket. We provide a 36-Month after-sale service.


  • Alarm Mode: The buzzer and indicator light will be triggered when voltage is detected. High-frequency beeps mean high voltage and live wires are detected. Low-frequency beeps sound mean low voltage and null wire are detected.
  • Measurable Voltage: Equipped with a sturdy metal NCV probe for testing AC voltage; the test probe touches the conductor with AC voltage, and the voltage reading will show on display.
  • Multi-Function: Bright LED flashlight for work in dark areas; Automatic Power Off after 5 minutes without operation or signal detection; Pocket-sized, pen hook allows you to carry it in your shirt pocket.
  • Special Function: Can be used as a screwdriver for your convenience while working.
  • Safety Level: CE CAT.II300V RoHS Certificate, a high voltage alarm warns you of voltage over 20V, the screen turns red, and a loud audible alarm sounds.

Both the Kaiweets VT500 and the VT100 Voltage testers are made of ABS/Plastic and have the control buttons on one of the long flat surfaces. The probes are on the front edge of the testers. Both take AAA batteries and both have screens that show the presence of voltage and both beep as an indication of a live continuous circuit. Both also have flashlights on the front.


The only setup required is to install a AAA battery in each tester.


The following video shows the performance of the Kaiweets VT500 and the Kaiweets HT100:

What I like

  • Nice designs for both testers
  • Clear displays
  • Good sensitivity and overall functionality

What I’d change

  • None

Final thoughts

The Kaiweets VT500 and HT100 voltage testers are simple tools that are great to have at hand when working with electrical wiring/circuits. While people have different methods of ensuring that they know the amount of voltage in a circuit or if it is “live” or not, double-checking using a Voltage Tester/Detector is a great safety precaution.

Price: $11.99 (VT500), $14.99 (HT100)
Where to buy: Kaiweets (15% OFF with code: Julie15) and they are also available from Amazon, Amazon
Source: The sample of this product was provided by Kaiweets

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