Color Black Model U Watch-01 Material Silicone Quantity 1 Piece Bluetooth Version V3.0 Operating Range 10m Standby Time 120 Hour Applicable Products OthersIphone 4 / 4S / 5 Samsung HTC Mi Sony Nokia Lenovo Battery Type Li-polymer battery Built-in Battery Capacity 300 mAh Plug Specifications US Plug (2-Flat-Pin Plug) Power Supply 100~240V Other Features Chip: CSR 6145; buluetooth V3.0 + EDR; USB interface; charging environment noise: =4 hours; music play: >= 6 hours; voltage: 3.3-4.2V; supports stereo music play sync contacts (250 max.); supports dialing via contact list; with 3 sets of alarms; Chinese / English display. Packing List 1 x Bluetooth watch 1 x Data cable (68cm) 1 x Charger 1 x English / Chinese manual