product description Memory: 128M Display: 1.71 inch TFT 280*320 resolution high-definition square screen Bluetooth: BT 5.0 Charging method: 2PIN magnetic cable Battery: Capacity 380mAH Waterproof grade IP68 Silicone strap, 20mm width, total strap length 265mm, adjustable area 170-248mm Functions: Step count, sleep, heart rate, exercise, blood pressure, weather, camera control, blood oxygen, music control, theater mode, stopwatch, alarm clock, timer, sedentary reminder, breathing training, message, brightness adjustment, mute, 2D code, split screen function 1. 8762DK platform + 128M large memory, Bluetooth 5.0 protocol; 2. Support 11 (built-in) + 1 (custom) + 1 (market) dials; 3. Jiugongge UI + split screen function, the UI scene is more intelligent; 4. 24 sports modes, covering more sports scenes; 5. 1.71-inch high-definition large screen, resolution 280*320; 6. HRS3690 low-power high-definition heart rate/blood oxygen, more accurate detection; 8. 380mAh large battery has long battery life, reducing the trouble of charging at any time; 9. Deep waterproof, suitable for wearing in more environments