Xiaomi Haylou Solar LS05-1 Smart Watch comes with RealtelRTL8762C chip, Bluetooth (Version 4.0), RAM160KB/ROM384kb Flash, IP68 Waterproof features. It's 1.28 Inch high-resolution Square full touch screen, makes the displayed content more vivid and beautiful. Bigger screen, fit the width of the wrist, bring a pleasant feeling of wearing. This Smart watch can accurately monitor pulses and the active and resting heart rate changes to generate a professional heart rate report.