UHD Retina Grade AMOLED Display
The Haylou RS4 Plus with a 368*448 Pixel’s unprecedented visual clarity, the large 1.78-inch screen provides a precise and clear experience anytime, anywhere.
Smart SpO2 Tracking
Sleepiness and fatigue after high-intensity exercise or work are insufficient oxygen in the body. Raise your wrist to test your blood oxygen level and keep your health under control.