Smart Watch Haylou RS4 Plus Black Retina AMOLED Display

Brand: Haylou Model: RS4 Display: 1.78″ (368 x 448) Large Retina AMOLED 60Hz HD Display Connectivity: Bluetooth V5.1 Material: Magnetic Strap, Silicone Strap OS: Android 6.0 and above, iOS 11.0 and above. Supported functions will vary with different watches, mobile phones, and countries. Sensor: 24-hour heart rate monitoring, SpO2 tracking, Temperature detection, Smart sleep monitoring Color: Black, Gold, Silver Warranty: 6 month Warranty