Nokia HS-11W Bluetooth Headset This headset is compatible with a wide range of phones equipped with Bluetooth wireless technology from Nokia and other manufacturers that support Bluetooth 1.1 specification. Convenient to use with easily accessible answer/end button Long talk time (up to 6 hours) and standby time (up to 160 hours) Bluetooth wireless technology 1.1 specification Comfortably changed from one ear to another - Lightweight - only 17g