Bluetooth version BLE 5.0 Bluetooth chip Huiding GR5515I0ND+Jerry Heart rate chip Tianyi Hexin HX3600 Hand ring memory RAM_ 256KB +ROM_ 64MB 1.8 inch Hancai glass IPS resolution 240X286 is displayed on the screen Battery capacity 320mah Standby time is about 30 days Working hours 7_ About 10 days Motor built-in vibration reminder Magnetic suction line of charging interface Waterproof grade IP67 Sensor Swaziland Micro SC7A205 Function: GPS motion track function in APP for 16 sports modes ( road, running, riding, ball, rope skipping, basketball, ball, swimming, mountaineering, cross-country running, yoga, fitness, dancing, hiking, indoor walking, indoor running) Call reminder, SMS, QQ, WeChat, Facebook, Twitter, Linkedln, WhatsApp, LINE, Instagram, Snapchat, Skype, Gmail, and other applications Smart alarm clock, turn the wrist to light the screen, light the screen time, find the mobile phone, reject the call, shake and take a picture Sitting reminder, alarm clock reminder, drinking reminder, menstrual reminder Time and date display, step count, calories, distance, stopwatch, countdown Heart rate monitoring, blood pressure monitoring, blood oxygen monitoring, sleep monitoring (sleep time, sleep quality)