LTPS 5Hz | 60Hz high refresh rate | Up to 600 nits brightness: Experience the biggest screen ever on the Redmi Watch, boasting a 26% increase in display area*. Paired with a 60Hz high refresh rate, it delivers incredibly smooth and silky visuals. Aluminum alloy frame: Redmi Watch 4 adopts a sturdy and reliable aluminum alloy frame* for the first time for a more elevated design feel. Make a fashion statement with two available color options. 20-day battery life: Outfitted with a sizeable battery and an energy-efficient chip optimized for longevity. Enjoy a 20-day extra-long battery life in typical usage mode. Portable magnetic charging lets you power up with a simple touch, for worry-free use. Bluetooth phone call: Redmi Watch 4 connects to your smartphone via Bluetooth, allowing you to view and reject calls on your watch, and engage in conversations with the built-in microphone and speaker without the need to take out your smartphone. 4-channel PPG sensor configuration: Greater monitoring accuracy – The PPG sensor configuration* has been upgraded to include 4-channel to help increase health monitoring accuracy. Smart sleep monitoring: With the help of scientific, meticulous sleep monitoring technologies, the watch records your real-time sleep condition at different stages, such as deep sleep, light sleep and REM, improving your sleeping habits and quality. 150+ sports modes: It caters to a wide array of professional sports modes, including outdoor and indoor running, walking, cycling, and more. Before your exercise, you can warm up* following the motion pictures of a professional coach and get the right posture to reduce sports injuries. Independent satellite positioning: Equipped with an independent GNSS chip, it works in tandem with your smartphone or on its own. Five satellite positioning systems are supported to accurately track your every step.