Haylou RS4 Smartwatch Specifications:

• 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.