... Description Mono and Stereo 2 in 1 Bluetooth headphone,U&I-20 Main FeaturesDual-Mic & Noise Filtering, more ... tech. MICRO USB Universal Charging, future standardizationMulti-point Function(U&I-20T)CE, FCC, RoHS approval Product SpecificationsBluetooth Specification: ... V2.1 + EDRBluetooth Profiles Supported: U&I-20: Headset, Handsfree, A2DP, AVRCP U&I-20T: Headset, Handsfree, Multi-pointTransmission ...