M4 Smart Watch-Android , Ios Smart Bracelet

bluetooth 0.96 inch 1a 2.1a 5v android android 4.4 bluetooth 4 days Bluetooth Version ios ios 8.0 Ios Smart Bracelet

All-day activity tracking Apple Samsung Huawei Automatic sleep monitoring Bracelet All-day activity clock face Bracelet Customizable clock face data Customizable clock fitness data Customizable function key Charging Hours Standby Time inch TFT color Incoming calls show key operation Power mileage Automatic sleep Samsung Huawei Xiaomi sleep quality Smart Smart Bracelet All-day TFT Screen size