The Xiaomi Mi Band 4 is a wearable activity tracker produced by Xiaomi Inc. It was announced in China on 11 June 2019[2] and in Europe the day after[3]. It was released in China on 16 June 2019[4] and in Europe on 26 June 2019[5]. It has a full-color capacitive AMOLED display. The tracker features 24/7 heart rate monitoring.
Specifications[6]
Display: 0.95 inch AMOLED, full color touch screen;
Colour depth: 24bit;
Screen brightness: Up to 400 nits;
Resolution: 128 x 240;
Button: Single touch button (wake up, go back);
Connectivity: Bluetooth version 5.0 BLE; NFC on some models[7][8];
Mass: 22.1 g;
RAM: 512KB;
ROM: 16MB:
Battery: LiPo, 135mAh, for 20 days of battery life;
Sensors: accelerometer, gyroscope, PPG heart rate sensor, capacitive proximity sensor;
Waterproof: up to 50 metres, 5 atmospheres
Specifications[6]
Display: 0.95 inch AMOLED, full color touch screen;
Colour depth: 24bit;
Screen brightness: Up to 400 nits;
Resolution: 128 x 240;
Button: Single touch button (wake up, go back);
Connectivity: Bluetooth version 5.0 BLE; NFC on some models[7][8];
Mass: 22.1 g;
RAM: 512KB;
ROM: 16MB:
Battery: LiPo, 135mAh, for 20 days of battery life;
Sensors: accelerometer, gyroscope, PPG heart rate sensor, capacitive proximity sensor;
Waterproof: up to 50 metres, 5 atmospheres
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