Original Xiaomi Youpin Amazfit GTR 47mm 1.39 inch AMOLED Screen Bluetooth 5.0 5ATM Waterproof Smart Watch, Support 12 Sport Modes / Heart Rate Monitoring / NFC Analog Door Card / GPS Positioning(Stainless Steel)

1. Positioning: GPS + GLONASSNFC 2. NFC: NFC city bus subway, access card simulation 3. Bluetooth version: 5.0 4. Battery capacity: 410mAh LiPo 5. Charging method: magnetic charging stand, 2Pin Pogo Pin charging 6. Theoretical charging time: about 2 hours 7. Waterproof and dustproof grade: 5ATM 8. Screen: 1.39 inches AMOLED, resolution: 454 X 454, 326 ppi 9. Material: metal, microcrystalline zirconium ceramics, polymer materials, strengthened glass + AF coating, leather rubber/rubber 10. Daily use mode: 24 days (Heart rate is always on, sleep monitoring; 150 messages a day push bright screen display, watch time 30 times, NFC swipe 4 times, other operations 5 minutes; exercise 3 times a week, each time Turn on GPS and run for 30 minutes) 11. Basic watch mode: 74 days (turn off the Bluetooth connection, heart rate and other functions of the mobile phone, and raise the wrist to brighten the screen 100 times a day) 12. GPS continuous working time: 40 hours 13. Support devices: Android5.0 and above, iOS10.0 and above 14. Sensors: BioTrackerTM PPG biological tracking optical sensor, acceleration sensor, 3-axis gyroscope, 3-axis geomagnetic sensor, air pressure sensor, capacitance sensor, ambient light brightness sensor 15. Functions: time/week display, heart rate monitoring, 12 exercise modes, GPS positioning, huami-PAI health assessment, NFC bus card payment, step counting, sleep monitoring, call reminder, SMS reminder, control music, alarm clock, compass , Find mobile phone, APP notification, stopwatch, countdown, etc. 16. Strap width: 22mm 17. Dimensions: 47.2 x 47.2 x 10.75 mm 18. Accessories: smart watch, magnetic charging stand, manual