1. Product number: YK16 2. System Requirements: Android 5.1 or IOS 8.2 or above support 3. Bluetooth version: BLE 5.4; low power consumption 4. CPU: RTL8773EWE 5. Heart rate chip: HX3917 6. Memory: RAM_578KB+ROM_640KB 7. External Flash: 128Mb 8. Screen display: 1.7-inch IPS resolution 360*360 9. Battery capacity: 1000mAh_ 10. Standby time: about 200 days 11. Operating hours: About 25 days 12. Physical buttons: Full touch plus 1 buttons 13. Motor: Built-in vibration reminder 14. Charging port: Magnetic line 15. Waterproof level: IP68 16. Accelerometer: STK8321 17. Watch language: Simplified Chinese, English, Spanish, Portuguese, Vietnamese, German, Italian, French, Russian, Japanese, Polish, Korean, Arabic, Hebrew, Thai, Croatian, Turkish, Czech, Dutch, Indonesian, Malay, Finnish, Greek, Romanian 18. App support language: Simplified Chinese, English, Spanish, Portuguese, Vietnamese, German, Italian, French, Russian, Japanese, Polish, Korean, Arabic, Hebrew, Thai, Croatian, Turkish, Czech, Dutch, Indonesian, Malay, Finnish, Greek, Romanian 19. basic skills: Time and date display, step counting, calories, distance, stopwatch, countdown, Heart rate monitoring, blood pressure monitoring, blood oxygen monitoring, sleep monitoring (sleep time, sleep quality), Watch brightness adjustment, watch MAC address viewing, Data, sports, sports records, weather, information, women, music, Sidebar, stopwatch, timer, alarm clock, payment code, Business card, calendar, calculator, Find phone, camera, Compass。 20. Watch side 9 sports mode, APP side massive sports mode 20. Reminder function: Phone calls reminding, sedentary reminds, the alarm clock to remind, SMS, QQ, WeChat, Facebook, Twitter, linkedin, WhatsApp, LINE, sets, Snapchat, Skype, Gmail, and other applications 21. Flashlight, compass, smart alarm clock, hand light screen, light screen time, find mobile phone, call rejection, Bluetooth call. 22. App: FitCloudP