Product name Haylou RT2 Main body size 45.7 * 45.7 * 12.1 mm Strap width 22 mm Watch weight ‘with strap’ 55 g Display screen 1.32″ TFT display Resolution 360x360px Bluetooth connection Bluetooth V5.0 Sensor Heart rate sensor, motion sensor, blood oxygen sensor Battery capacity 300 mAh System requirement Android 6.0 and above, iOS 11.0 and above. Supported functions will vary with different watches, mobile phones, and countries. Waterproof grade IP68
