Haylou RS4 Smart Watch

Product name : Haylou RS4
Bluetooth connection : Bluetooth V5.1
Main body size : 45.2*37.2*11.1mm
Sensors : Heart rate sensor, motion sensor, blood oxygen sensor
Strap width : 20mm
Watch weight : 48.6g (with strap)Display : 1.78″ AMOLED display
Resolution : 368x448Battery
capacity : 230mAh
Battery life : About 12 days (24 hours heart rate monitoring)
System requirement : Android 6.0 and above, iOS 11.0 and above.
Supported functions will vary with different watches, mobile phones, and countries.