Fangrui Product Details 1. Wearkey Dt4+ 1.36 Inch Hd Screen Smart Call Watch With Nfc Function, Color: Silver Silicone 2. Material: Zinc Alloy, Electronic Components 3. Functions: Multiple Sports Mode Tracking, Heart Rateecg Monitoring, Step Counting, Smart Reminder, Weather Information, Sleep Analysis, Nfc Unlocking 4. Language: English, Chinese (simplifiedtraditional), Japanese, French, German, Italian, Spanish, Russian, Portuguese, Malay, Korean, Polish, Vietnamese, Persian, Greek, Czech, Turkish, Hebrew, Latin, Danish 5. Main Control Chip: Rtk8762d 6. Screen Size: 1.36 Inches (tft Screen) 7. Screen Resolution: 390 X 390pixel 8. Bluetooth Version: 5.0 9. Wireless Distance: 5-10m (inclusive) 10. Body Memory: 64mb 11. Wearing Method: Wristband 12. Compatible System: Fully Compatible 13. Battery Capacity: 280mah Lithium Battery 14. Operation Mode: Touch + Button 15. Waterproof Grade: Ip68 16. Magnetic Fast Charging, More Convenient To Use, Fast Full Charge 17. 16 Led Light Sensor Design On The Back Of The Watch, Real-time Monitoring Of Heart Rate 18. Using Ppg+ecg Technology To Detect Ecg In Real Time