Features: 1. 8773EWE, 128M large memory, BT 5.2 protocol; 2. Support BT calls, one-click connection, more convenient call scenes; 3. Cool UI, support drag operation + quick center function; 4. Large memory, built-in 5 dials + six menu modes, rich UI scenes; 5. Support 8 commonly used sports modes, APP can add 100+ sports modes; 6. 1.8-inch large screen, HD resolution; 390 x 390 7. Wiki_Heart Rate Sensor_VC30F_S Low power consumption and high-precision heart rate and blood oxygen, support liveness recognition, more accurate detection; 8. IP67 deep waterproof, suitable for wearing in more environments. Hardware Specifications: 1. CPU: 8773EWE 2. Memory: 128M 3. TP: G+F, CST820 4. LCD: 1.8 inch IPS, resolution: 390 x 390 5. Motor: 0827 flat motor, wire welding 6. Speaker: 1012, deep waterproof speaker 7. Mic: 4015 8. BT: BT 5.2 9. Communication formatdata transmission: BT 10. Heart rate: Wiki_heart rate sensor_VC30F_S 11. G-Sensor: STK8321, accurate step counting 12. Charging method: 2 pin magnetic suction line with a spacing of 7.6mm 13. Battery: 800mAh, V3.8 general pressure 14. Waterproof grade: IP67 Functions: 1. Basic software functions: shortcut bar (control center), data (steps, distance, calories), heart rate, blood pressure, blood oxygen, sleep, wrist-raising screen, weather, WeChat sports, information, reminders (messages, drinking water, sedentary, alarm clock), women's health, stopwatch, countdown, find phone, find bracelet, shake to take pictures, dial switch, music control, settings (language selection, brightness adjustment, screen on time, vibration setting, factory reset, version information), components (function editing), password lock, breathing training, exercise, exercise history, do not disturb mode, power saving mode, low power reminder, voice assistant (SIRI), call function, common contacts, phone dial, split screen (sidebar), scan code connection, c