Black Wireless Stereo Bluetooth Headset with built-in Mic for all T-mobile phones * Crystal clear sound for communication and excellent Stereo sound for music entertaiment * High-fidelity stereo sound for music and crystal clear for talk * Long music time up to 8 hours, 9 hours talk time * Light (23g) , compact (keep in your fist), comfort, secure and easy to carry * Gaming and chat and VoIP (Skype, MSN, etc)