Specifications Standby time: 400 hrs Auto-switch music-calls Super-light Weight 72 gms Working Distance: 10m Features Stereo Bluetooth headset with back-hang style Supports Bluetooth A2DP, AVRCP, and HS/HF profiles Features Software & CVC echo/noise cancellation Foldable design provides maximum portability Wirelessly enjoy stereo music from all A2DP-enabled-devices, such mobile phones, PDA, PC etc Switch automatically from remote controls on the headset allow you to play, skip and select your music tracks