Detailed Product Description Mono and Stereo 2 in 1 Bluetooth headphone,U&I-20 Main FeaturesDual-Mic & Noise Filtering, more clear ... Slim Design, more fashion With In-ear Earpiece, more popular and comfortable BLUETOOTH V2.1, higher version, higher tech. ... , RoHS approval Product SpecificationsBluetooth Specification: V2.1 + EDRBluetooth Profiles Supported: U&I-20: Headset, Handsfree, A2DP, AVRCP U&I ...