Fangrui Product Details 1. Qs16pro 1.69-inch Health Monitoring Waterproof Smart Watch, Supports Body Temperature Detection, Color: Thick Black Steel 2. Material: Pc+abs, Tpusteel, Electronic Components 3. Functions: Multiple Sports Mode Tracking, Pedometer, Heart Rate Monitoring, Blood Pressure Measurement, Sleep Monitoring, Blood Oxygen Detection, Smart Reminder, Remote Selfie, Information Push, Call Notification 4. Applicable System: Android 4.4 And Above, Ios 8.0 And Above 5. Supported Languages: Russian, Indonesian, German, Italian, Czech, Japanese, French, Polish, Simplified Chinese, Traditional Chinese, English, Portuguese, Spanish, Arabic, Korean, Dutch, Indian Local Language 6. Screen Size: 1.69 Inches (ips Screen) 7. Screen Resolution: 240 X 280pixel 8. Bluetooth Version: 5.0 9. Wireless Distance: 5-10m (inclusive) 10. Body Memory: Ram: 160kb+rom:384kb+flash:64mb+ Main Frequency: 40mb 11. Battery Capacity: 180mah Lithium Battery 12. Charging Time: 3 Hours 13. Working Time: 7-10 Days 14. Standby Time: 12-15 Days 15. Operation Mode: Touch + Button 16. Waterproof Grade: Ip67 17. Equipped With Infrared Sensors To Accurately Measure Blood Oxygen Concentration 18. Using 1.69-inch Large Screen + High-hardness Glass, Wear-resistant And Clear