MCU JL7013A6 G-sensor 3-axis Heart rate dynamic heart rate+release detection Motor flat motor Waterproof speaker Touch screen full screen touch control Screen size 1.27 inches IPS TFT Screen resolution 360 * 360 Storage FLASH 128M source Working voltage 3.8V Battery capacity 280mA Charging voltage 5V Charging current 500mA Standby time approximately: 30 days Working hours using phone calls: approximately 4 days Not using calls: about 7 days Battery type polymer rechargeable lithium battery Charging method: magnetic suction charging Charging time 2-3 hours Structural parameters Waterproof grade IP68 Screen cover high hardness glass Medium frame material alloy process+hardened glass Bottom shell material, bio based composite PC+ceramic material Wrist strap material silicone strap Wrist strap size table with a bandwidth of 20mm Suitable for wrist circumference of 150-195mm Watch buckle, Lizai 301 stainless steel Body dimensions (L x W x H) mm 42.2 * 10.80mm Working temperature from 0 to 45 Charging temperature from 0 to 40 Storage temperature within 1 month -10 ~45 Storage humidity 75% RH Battery life 300 times, greater than 80% (25 2 )