Features: 
Model Number:
SK27
Battery capacity:
400mAh
Bluetooth version:
5.1
Screen display:
1.58 inches
Screen resolution:
466*466
NFC:
Support
Body size:
48*13.3mm
Band size:
265mm
Compatibility system:
Android 5.0+ and iOS 9.0+
Level Waterproof:
IP68