Polar M400
Quick details
Released
September 2014
Dimensions
38 x 50 x 11.5 mm
Operating system
Proprietary
Display 1.31 inches LCD
Battery life up to 30 days in normal mode; up to 8 hours of training time with GPS and Bluetooth Smart heart rate sensor
Water resistance 3 ATM
GPS Yes
Sensors GPS, Accelerometer
Technical specifications
General
Release date 2014-09
Product type Running watch
Physical size 38 x 50 x 11.5 mm
Weight 57 grams
Material Silicone, plastic
Water resistance 3 ATM
Color options Black, Blue, Pink, Red, White
Display type LCD
Display size 1.31 inches
Display resolution 128 x 128 pixels
Battery Rechargeable lithium-polymer battery; 190 mAh
Battery life up to 30 days in normal mode; up to 8 hours of training time with GPS and Bluetooth Smart heart rate sensor
Charging Micro USB
Sensors
GNSS type Built-in GNSS
GPS Yes
GALILEO No
GLONASS No
QZSS No
Beidou No
Accelerometer Yes
Gyroscope No
Barometric altimeter No
Compass No
Geomagnetic No
Ambient light sensor No
Optical heart rate No
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
Sleep Yes
Heart rate Yes (with compatible Bluetooth heart-rate sensor)
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
Training Load Pro No
Recovery Pro No
Nightly Recharge No
SleepWise No
FitSpark No
FuelWise No
Hill Splitter No
Wrist-based running power No
Running Performance Test No
Cycling Performance Test No
Walking Test No
Orthostatic Test No
Leg Recovery Test No
Running Index Yes
Energy Sources No
Sleep Plus Stages No
Hyperglycemia risk assessment No
Arterial stiffness detection No
Pulse wave arrhythmia analysis No
Daily smart features
Operating system at launch Proprietary
Bluetooth Yes
Wi-Fi No
NFC / connected pay No
UWB No
Cellular No
Smartphone notifications Yes
Bluetooth calling No
Smartphone music control No
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.
