V66 1.28inch BT5.0 Smart Watch Support Heart Rate Sleep Detection 1. Chipset: 8763EWE+ VC30F 2. Compatible System: iOS 12 or above, Android 8 and above 4. Display size: 1.28 inches 5. Bluetooth: 5.0 6. Features: Standard functions (128Mb standard): OTA, Quick Bar (Control Center), Data (Step Counting, Distance, Calories), Heart Rate, Blood Pressure, Blood Oxygen, Sleep, Wrist Brightening Screen, Weather, WeChat Exercise, Information, Reminder (Message, Drink, Sedentary, Alarm Clock), Women's Health, Stopwatch, Countdown, Find Phone, Find Bracelet, Shake to Take a Photo, Watch Face Switch, Music Control, Settings (Language Selection, Brightness Adjustment, Screen Duration, Vibration Settings, Factory Reset, Version Information), Switch LOGO, Components (Function Edit), Combination Lock, Breathing Training, Exercise, Sports History, Do Not Disturb Mode, Battery Saver Mode, Low Power Reminder, Voice Assistant (SIRI), Call Function, Frequent Contacts, Phone Dial Pad, Split Screen (Sidebar), Flashlight, Collection Code, Scan Code Connection, Business Card (Make Friends), Calculator, Engineering Test Mode & Shipping Mode, Calendar. - Sleep detection 7. Resolution: 416×416 8. Battery Capacity: 230mAh 9. Language support: - APP languages: English, Chinese Simplified, Chinese Traditional, German, French, Arabic, Czech, Greek, Spanish, Japanese, Farsi, Italian, Korean, Dutch, Polish, Portuguese, Russian, Finnish, Swedish, Thai, Hungarian, Slovak, Croatian, Albanian, Turkish, Ukrainian, Hindi, Vietnamese - Bracelet language: Chinese dialects: Chinese, English, German, French, Italian, Spanish, Japanese, Polish, Russian, Portuguese, Vietnamese, Arabic, Hebrew, Thai, Turkish, Czech, Dutch, Finnish, Greek, Hindi, Farsi, factory default English 10. with LED indicator light, OTA 11. Charging method: magnetic suction