Model Number：FK88 PRO
Screen Resolution：320x240
Operation System：Android, IOS
Band Material：Silica Gel
Case Material：Alloy
Waterproof：IP67
Screen Size：1.78in
Compatible system：Android 4.5+/iOS 9.0+
CPU：MT2502
FLASH：RAM128KB+ROM1M
Battery：180mAh

1.78 Full screen touch, HD screen, encoder knob, Bluetooth call, various motion modes,

2.5D Globoidal Capacitive Fully-Fitted Touch Screen

Heart rate monitoring, all-weather monitoring of your heartbeat

Objectively, scientifically and quantitatively record and analyze your sleep status