1.78″ AMOLED HD display / 12 workout modes / IP68 waterproof / SpO2 tracking / 10 days battery life / Heart rate monitoring
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 368×448
Battery 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.
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