1. Put on all steering wheels 2. Powered by 3xAA battery 3. Can be 6 hrs' talking 4. Support 2 cellphones' pairing meanwhile Certificate: CE, RoHS, FCC, BQB Bluetooth Handsfree Car Kits, Bluetooth Car Kit, Bluetooth Handsfree Car KitFeatures/Specifications:Answer/end/reject a call,voice dialing,last call redialing1. Universal fitting systems for all steering wheels or stick on anywhere in your ...