Features: - Clips comfortably to your clothes - Uncomplicated single button control - Pairs with two Bluetooth mobile phones simultaneously* - Buzzer function lets you know when a call is coming through - Enchanced voice clarity makes it easy to chat - 4 level volume control - Mute function - Rechargeable battery - Works with compatible Bluetooth phones Specifications: - Bluetooth specification v2.0 class 2 - Supports Bluetooth handsfree profile - Talk Time: up to 6 hours^ - Standby Time: up to 120 hours^ - Nominal Charging Time: 3 hours - Compatible i.Tech 110 ~ 240Vac switching power