Xiaomi Watch S4 Rainbow

Key features of the Xiaomi Watch S4 Rainbow smartwatch

Precisely crafted AMOLED display with a fine resolution

The AMOLED display of the Xiaomi Watch S4 is a joy to behold. Everything is perfectly visible on the 1.43" display, and thanks to AMOLED technology, you can look forward to a more colourful and smoother picture. The Xiaomi Watch also boasts excellent readability even in direct sunlight, so you won't miss any incoming notifications. The brightness reaches a maximum value of 2200 nits, and the display's glow can automatically adjust to the ambient conditions. The watch display has a resolution of 466 × 466px with a fineness of 326 PPI and a refresh rate of 60Hz.

Up to 15-day battery life

Inside the Xiaomi Watch S4 is a 486mAh battery that uses AI algorithms to optimise power consumption. In smartwatch mode, the battery life is around 15 days. If you want to quickly charge the watch, just 5 minutes on the charger will give it enough power for up to 2 days of normal use.

Xiaomi Watch S4 uses multi-system GPS and has great battery life

The Xiaomi Watch S4 is equipped with a GNSS chip that supports all five key positioning systems: GPS, BeiDou, GLONASS, Galileo, and QZSS. The chip also features enhanced advanced algorithms that serve to determine your position faster and more accurately.

The Xiaomi smartwatch offers more than 150 sports modes

Don't be afraid to get active and start exercising or doing other activities. With the Xiaomi Watch S4, you can accurately measure your performance parameters—heart rate, average heat, or calories burned. You'll have a choice of more than 150 sports modes. Of course, it features 5 ATM water resistance, so you can go swimming without worry and measure your swimming performance. The Xiaomi Watch S4 smartwatch provides professional courses and systematic workouts. Using advanced sensors, the smartwatch can automatically recognise key running technique indicators (vertical ratio, vertical amplitude, or ground contact time). With the Xiaomi Watch S4 smartwatch, you can also record the length, distance, and average speed of every ski/snowboard run. You will find more detailed information in the app on the results page. You can also view a map of your ski trail.

Xiaomi Watch S4 has a sophisticated PPG biosensor

The Xiaomi Watch S4 performs 24-hour heart rate monitoring and can monitor blood oxygen level SpO₂. The PPG biosensor with improved hardware and algorithms ensures more accurate heart rate measurement during both low and very high-intensity activities. If you are stressed, the Xiaomi Watch S4 can offer you breathing exercises to help you calm down. You can adjust the blood oxygen measurement interval—keep it all-day or set your preferred interval. The Xiaomi Watch S4 smartwatch more accurately records your night's sleep with all its stages, while also capturing occasional short naps during the day. With the Xiaomi watch, you can identify your sleep pattern and improve your sleeping habits.

Handle calls from your paired phone right from your wrist

Connect your Xiaomi Watch S4 to your phone via Bluetooth and you can handle incoming calls from your wrist. The watch is equipped with a microphone and a speaker. This can also be used in an emergency, as pressing the side button in the bottom right corner three times will dial your emergency contact. For this feature to work, you need to connect the Xiaomi Watch S4 to your mobile phone via Bluetooth and set an emergency contact in the app. A notification can also be sent to the contact automatically if you do not respond to the prompt that you are okay within 60 seconds.

Xiaomi Watch S4 enables contactless payments

Thanks to NFC technology, you can use contactless payments and pay with your Xiaomi watch via Mastercard and Visa cards. This feature is available with selected banks and needs to be verified on the manufacturer's or bank's website.

Mi Fitness app

Always have fresh and detailed information about your health or activity at hand. After pairing with the Xiaomi Watch S4 smartwatch, the companion Mi Fitness app saves all measured data, which you can then view clearly. It now also supports the Health Connect service and training apps such as Strava or Suunto.