ESTAR Smartwatch with calling function compatible with Microsoft Lumia 640 XL Silver Smartwatch(Silver Strap Regular)

m9 Smart (BT) Watch LCD touch screen Resolution 240*240 pixel Touch Screen OGS touch screen Bluetooth Ver 4.0 Camera 2.0 M Battery type Lithium-ion polymer battery Shell material Metal Watch strap Silicone G-sensor Pedometer, sedentary reminder, sleep monitor,anti-lost Phone GSM/GPRS, hands-free call,call history,phone book; Bluetooth; Bluetooth music play; Call reminder Bell and vibration;Anti-lost reminder; Two-way search Pedometer; Movement step gauge; calories calculate ; mileage record; Sedentary remind; Support Sleep monitor ;Support Photograph; Support Other function Alarm, calendar, stopwatch,calculator and etc.