New Version Design Bluetooth Bracelet Vibrating-Caller with LCD ID Alert Vibration Wrist Watch Digital Time NEW Design Bluetooth Bracelet Vibrating-Caller W/ LCD ID Alert Vibration Wristwatch Watch Digital time Anti-Loss Bracelet will Vibrate when call come and show caller's number, answer the phone or press any button, it will stop vibrating. if you are not convenient to answer the phone, press the "B" button for three times, the phone will be hanged up. Come without power adapter charger but is charged through PC with USB cable directly. Bluetooth Version:V2.1;Compatible with: V1.1, V1.2, V2.1; Voltage:3.6V-4.2V;Current:45mA;Frequency:2.4GHz;Charge time:2 hours Standby time:72 hours;Battery:Lithium Polymer The Bluetooth bracelet with clock works as a timer(12 hours), the bluetooth bracelet is capable of every brand Bluetooth mobile phone