Fangrui Product Details 1. Ak83 Bt Call Smart Watch, Support Blood Pressure Heart Rate Sports Health Monitoring Fitness Tracker 2. Hardware Parameters: 3. Main Chip: Realtek 8763ewe 4. Memory: 16mb Flash + 160kb Ram, External Expansion 128mb Flash 5. Screen: 1.46 Inch Ips Colorful Lcd; Resolution: 360 X 360 6. Touch: Full Touch 7. Bluetooth-compatible: V 5.0 8. Heart Rate Sensor:wiki Heart Rate Sensor Vc30f S; G-sensor: St+ Wiki Go More Algorithm 9. Battery: 400mah Polymer 10. Waterproof: Ip68 11. Smart Bracelet Material: Main Metal, Tpu Watchband 12. Size: 46 X 46 X 13.0mm 13. Weight: 55g 14. System Parameters: 15. Android System: Support Android 4.4 And Above 16. Ios System: Support Ios 9.0 And Above 17. Function: Notification (withcontent For Facebook, Twitter, What App, Wechat, Line Kakao Talk Lnstagram), Encoder, Pedometer, Music Player, Bt Call, Call Records, Contact Person, Phone Dialing, Sedentary Reminder(app), Sleep Monitor, Remote Camera, Weather Forecast, Heart Rate, Blood Pressure 18. App Support Language: Support 13 Languages (chinese, Traditional Chinese, English, Korean, Japanese, German, Russian, Spanish, Italian, French, Polish, Arabic, Portuguese) 19. Watch Language: English, Simplified Chinese, Japanese, Kor., German, French, Spanish, Arabic, Russian, Traditional Chinese, Italian, Portuguese, Polish, Czech, Vietnamese 20. App Name: Dafit 21. Packing List: 22. Watch X 1 23. Charge Cable X 1 24. Manual X 1