A Leap Vision and Touch: 2.0-inch HD display, 85% screen-to-body ratio. Zinc alloy middle frame, dual control button design Smart Assistant on Your Wrist: Real-time notifications, one-key Bluetooth-compatible calling Reach for a Smart Life: Powered by RunmefitOS 2.0. Equipped with rich built-in watch apps. Compatible with iOS and Android systems All-round Health Management: Keep track of heart rate, blood oxygen, stress, sleep, and other metrics 100+ Sports Modes: Support automatic sports recognition Specifications: Basic Parameter Watch size（ mm） L*W*H=50.5*38.6* 12.3mm Watch Weight (N.W) 31.6g (48.9g Including strap) Wristband size Total length 253MM, adjustable length 120-200MM Appearance material Body: Zinc alloyButton: Aluminum alloy Bottom case: ABS+PCStrap: Silica gel APP Runmefit Compatible System Android4.4 and IOS9.0 and above Type TFT Color Screen Screen size 2.0 inch Resolution (R.G.B) 320*386 Touch type Full touch TechnicalParameter BT BT5.3 Bluetooth-compatible distance 10M Chipset JL7012 G-Sensor SC7A20 Heart Rate sensor HX3918 Blood oxygen sensor HX3918 RAM 640KB FLASH 128M Button Knob + Physical buttons Waterproof Level IP67 Battery Baterry Type Lithium polymer battery Capacity 300mAh Life time Up to 7-10 Days of use, 45 Days of standby Charging time <td style="width: 1