HD1 1.3 Inch AMOLED Screen Smart Watch with NFC Function 1. Material: alloy, silicone, steel, electronic components 2. Functions: multiple sports mode tracking, heart rateblood pressureblood oxygen monitoring, breathing exercise, dialinginformation reminder, sleep monitoring, video entertainment, smart reminder, remote control selfie 3. Screen size: 1.3 inches (AMOLED high-definition screen) 4. Menu language: Simplified Chinese, Traditional Chinese, English, German, French, Spanish, Korean, Japanese, Russian, Portuguese, Italian, Ukrainian, Arabic, Polish, Persian, Thai, Burmese, Vietnamese English, Hebrew, Malay 5. Screen resolution: 390 x 390pixel 6. Bluetooth version: 4.0, 5.0 7. Wireless distance: 5-10m (inclusive) 8. Body memory: 128M 9. Wearing method: wristband type 10. Compatible system: fully compatible 11. Communication function: support 12. Battery capacity: 200mAh lithium battery 13. Battery voltage: 3.7V 14. Charging time: about 2 hours 15. Charging method: magnetic charging 16. Operation mode: touch + button 17. Waterproof grade: IP68 18. Magnetic fast charging, more convenient to use, fast full charge 19. LED light sensor design on the back of the watch, real-time detection of blood pressure, heart rate, blood oxygen 20. The watch supports NFC access control unlocking function 21. Remarks: Ship with two straps of steel and silicone