Fangrui Product Details 1. F38 Dual-ear Bluetooth Earphone Smart Watch Ip67 Supports Heart Rate Monitoring 2. Main Chip: Ats3085s 3. Memory: 4mb Ram + 512mb Flash 4. Bluetooth Version: Ble 5.3, Compatible With 4.22.1 5. Heart Rate Sensor: Hx3300 6. Screen: 1.39-inch, 360x360 Resolution, Full-screen Touchscreen 7. Battery Capacity: 280mah 8. Standby Time: 30 Days 9. Operating Time: 3-7 Days 10. Charging Method: Magnetic Charging 11. Waterproof Rating: Ip67 12. App: Canfit 13. System Requirements: Android 5.1 Ios 9.0 And Above 14. App Language Support: English, French, Spanish, Simplified Chinese, Russian, Japanese, Portuguese, German, Italian, Arabic, Traditional Chinese, Thai, Korean, Polish, Persian, Turkish, Dutch, Hebrew, Romanian 15. Functions: Pedometer, Heart Rate Monitoring, Real-time Heart Rate Monitoring, Sleep Monitoring, Sedentary Reminder, Mileage, Calories Burned, Text Message Notifications, Weather Forecast, Workouts, Music Control, Alarm, Timer, Breathing Exercises, Dialing, Contacts, Call Logs, Ai Voice Recognition, Alipay Payment, Nfc 16. Body Material: Metal 17. Dial Size: 47.8x48x13.2mm 18. Watchband: 22mm Width, 220 Mm Length