Vibration and Warning Function-Steel strap Featuren Bracelet Watch Cell Phonen With time displayn Display Size: 20mm wide n Bluetooth version: 1.2 n Frequency range: 2.4GHz n Vibration and Warning Functionn Beautiful leather strap Specificationn Primary Function: Bluetooth bracelet with vibration function and LCD display n Can charge using your laptop or home PC via the USB cable provided n Can ...