Connectland CL-AUD23028 Universal Wireless Bluetooth V4.0 + EDR norm Sport Band Headphone, Black Built-in Microphone (Higher sensitivity for clearer calls) Built-in Rechargeable Battery (Charges Through USB Compatible with HSP, HFP, A2DP, AVRCP Intuitive Buttons: (Control Player Remotely from Headphones), Last Music Track, Next Music Track, Volume Up, Volume Down, On/Off (Play/Pause/Answer/Hang Up/Pairing) Stereo Full, and Rich Sound