Have an awesome stereo speaker system but no way to get your music to it wirelessly? That’s where AirBlue from Kanex comes in. Shaped like a hockey puck, it’s a Bluetooth audio receiver into which you can plug a 3.5mm audio cable. Just pair your iPhone (or any Bluetooth-enabled music player) to AirBlue, and you’ll be able to play your music wirelessly up to 33 feet away. The AirBlue has an internal rechargeable battery that lasts up to 10 hours. AirBlue is priced at $49 direct from Kanex.