HAMTOD GT45 1.6 inch Waterproof Smart Watch, Support Bluetooth Call Heart Rate Blood Oxygen Monitoring NFC Features 1. Outdoor sports, Jiaming flow appearance. 2. 1.6-inch ultra-clear large screen, ultra-narrow bezel, the best screen choice for the round screen style, and the ultimate look and feel level. King panda glass, high strength, wear-resistant and scratch-resistant. 3. Genuine Alipay offline payment. 4. Compass. 5. 100+ sports modes. 6. HD Bluetooth call, one connection. 7. 340mAh large battery, strong battery life. 8. Dial market. 9. Dynamic heart rate, running can also be accurately measured. 11. Low power consumption true blood oxygen, verifiable (breath-holding blood oxygen value will drop). 12. Real IP67 waterproof, real 1 meter water depth for 30 minutes, almost no wading problems after sale. Specifications 1. CPU: Jerry II JL7012A6 2. Built-in storage: 640KB 3. External expansion flash: 128Mb 4. Display: 1.6-inch full-circle full-color full-view TFT; resolution: 400*400; 5. Touch screen: Panda high aluminum glass cover; capacitive full touch screen; full lamination 6. Bluetooth: BLE Ver5.1 and BT3.0 two in one 7. Heart rate sensor: support dynamic heart rate, HRS3605, measure 36 levels of black skin; 8. Blood oxygen sensor: support 9. Battery: 340mAh polymer lithium-ion battery; pure cobalt, Seiko protection board 10. Battery life: Bluetooth connection standby: About 30 days; normal use: 7~10 days. 11. Pedometer: Support 12. Motor: Support 13. Microphone: Support 14. Speaker: Support 15. Buttons: Power button & function button 16. Compass: Support 17. Charging method: Magnetic charging cable; DC5V--300mA 18. Dustproof and waterproof level: True IP67 (1 meter water depth, 30 minutes) 19. Electrostatic protection level: Contact 4KV, air 8KV 20. Main functions: 21. Multiple dial switching: Support, dynamic dial 22. Multiple UI style switching: Support 23. Dial Market: Support 24. Mobile APP message not