Watch Machine head size:44.37*38.28*12.5MM Strap width:22mm Front shell:Alloy (plating) Back shell:Plastic Black ABS+PC Strap:Silicone Motherboard CPU:8918B G sensor:SC7A20 HR sensor:Tianyi Hexin HSR3300 Screen:Full screen touch BT version:5.1?LE+Basic? BT Name:Watch Vibration:...