Xiaomi Smart Band 4
Quick details
Released
June 2019
Dimensions
21.6 x 10.8 x 12 mm
Operating system
Proprietary
Display 0.95 inch AMOLED
Battery life up to 20 days
Water resistance 5 ATM
GPS Connected GPS (phone required)
Sensors GPS, Accelerometer, Gyroscope, Optical heart rate
Technical specifications
General
Release date 2019-06
Product type Fitness tracker
Physical size 21.6 x 10.8 x 12 mm
Weight 22 grams
Material Polycarbonate, silicone wristband
Water resistance 5 ATM
Color options Black, Blue, Red
Display type AMOLED
Display size 0.95 inch
Display resolution 120 x 240 pixels
Display brightness Up to 400 nits
Display protection 2.5D curved glass
Battery Rechargeable battery; 135 mAh
Battery life up to 20 days
Charging Magnetic charging
Sensors
GNSS type Connected GPS
GPS Connected GPS (phone required)
GALILEO No
GLONASS No
QZSS No
Beidou No
Accelerometer Yes
Gyroscope Yes
Barometric altimeter No
Compass No
Geomagnetic No
Ambient light sensor No
Optical heart rate Yes
Electrical heart rate No
SpO2 No
Temperature No
Galvanic skin response No
Microphone No
Speakers No
Vibration motor Yes
Health & activity tracking
Steps Yes
Distance Yes
Calories burned Yes
Floors No
Sports tracking Yes (6 sports modes)
Sleep Yes
Heart rate Yes
HRV No
Stress No
Blood oxygen No
Respiration rate No
Skin temperature No
ECG No
Blood pressure No
Body composition No
Glucose No
Hydration level No
UV exposure No
Calorie intake No
Vitality Score No
Hyperglycemia risk assessment No
Arterial stiffness detection No
Pulse wave arrhythmia analysis No
Daily smart features
Operating system at launch Proprietary
RAM 512 KB
Storage 16 MB
Bluetooth Yes (5.0 BLE)
Wi-Fi No
NFC / connected pay Yes (NFC version only)
UWB No
Cellular No
Smartphone notifications Yes
Bluetooth calling No
Smartphone music control Yes
On-board music storage No
Voice assistant No
Links
These technical specs are correct to the best of our knowledge at the time of publishing.
