Battery type: 502026 polymer
Band width: About 2cm
Speaker size: 1OMM
Solid stainless steel back cover
Battery life including charging box: about 40 hours (noise reduction off)
V66 1.28inch BT5.0 Smart Watch Support Heart Rate/ Sleep Detection, Steel Strap, Silicone Strap New Battery type: 502026 polymer1. 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,