Xiaomi Smart Band 4
- Screen 0.95 inch OLED Display
- Battery life Up to 20 days
- Water resistance 5 ATM
- Sensors 3-axis accelerometer, 3-axis gyroscope, capacitive proximity sensor, optical heart rate sensor
- Date June 2019
Specs
General
| Physical size | 21.6 x 10.8 x 12 mm |
| Material | Polycarbonate, silicone wristband |
| Charging | Magnetic charging |
| Battery | 135 mAh |
| Battery life | up to 20 days |
| Water resistance | 50 metres (5 ATM) |
| Weight | 22 grams |
| Display type | Colour AMOLED with 2.5D curved glass protection. Screen brightness up to 450 nits. |
| Display size | 0.95 inch |
| Display resolution | 120 x 240 pixels |
| Color options | Black, Blue, Red |
Sensors
| Accelerometer | Yes |
| Barometric altimeter | No |
| Compass | No |
| Galvanic skin response | No |
| Geomagnetic | No |
| Gyroscope | Yes |
| Optical heart rate | Yes |
| Electrical heart rate | No |
| SpO2 | No |
| Temperature | No |
| GPS | No |
| GALILEO | No |
| GLONASS | No |
| QZSS | No |
| Beidou | No |
| Ambient light sensor | No |
| Vibration motor | Yes |
| Microphone | No |
| Speakers | No |
Health & activity tracking
| Steps | Yes |
| Distance | Yes |
| Calories burned | Yes |
| Sports tracking | Yes (6 sports modes) |
| Floors | No |
| Sleep | Yes |
| Heart rate | Yes |
| Stress | No |
| Blood oxygen | No |
| Respiration rate | No |
| UV exposure | No |
| Skin temperature | No |
| Hydration level | No |
| HRV | No |
| ECG | No |
| Calorie intake | No |
| Blood pressure | No |
| Glucose | No |
| Other | Stopwatch, Alarm clock, Timer, Find my phone, Phone unlock, Event reminder, Do not disturb mode (works even without phone), Lock screen |
Daily smart features
| Smartphone notifications | Yes |
| Smartphone music control | Yes |
| On-board music storage | No |
| Connected pay | Yes |
| Cellular | No |
| Connectivity | Bluetooth 5.0 |
| Operating system | Proprietary |
Disclaimer Note
These technical specs are correct to the best of our knowledge at the time of publishing.
