2V nickel-metal hydride rechargeable battery but not equipped
Bluetooth Wireless Connection: Connect to your phone via Bluetooth
Good compatibility
Scope of application: indoor ranging measurement
Appearance size: 125mm*90mm*36mm
BW0223 Heart Rate/Blood Oxygen/Blood Pressure Monitoring Bluetooth Smart Calling Watch, Color: Mesh Black Cologne for Men 2V nickel-metal hydride rechargeable battery1. Material: plastic, silicone metal, electronic components 2. Supported languages: The watch interface supports English, Simplified Chinese, French, German, Italian, Spanish, Russian, and Portuguese (message content push supports multiple languages) 3. System: Android5. 0+, IOS9. 0+ 4. Functions: waterproof, audio visual entertainment, photo taking, step counting, social entertainment, smart reminder, remote Selfie, information push, motion tracking,