Polar M430
Tech specs 
Size12mm thickness
MaterialSilicone, plastic
ChargingProprietary USB cable
Battery240 mAh lithium polymer battery
Battery lifeup to 8 hours of training time with GPS and optical heart rate
Water-resistance30 metres (WR30)
Weight51 grams
SensorAccelerometer, GPS, heart rate sensor (with 6 LEDs for increased accuracy)
DisplayLCD, 128 x 128 px high resolution
Screen size23 x 24 mm
ColorsBlack, Pink, White, Blue, Red
OtherPLATFORM: Propriatory
MEMORY: 8 MB Flash memory
CONNECTIVITY: Bluetooth, Wifi
Activity tracking 
Calories burnedYes
Heart rateYes
Stress & recovery
Pulse Ox
Respiration rate
UV exposure
Skin temperature
Galvanic skin response
Hydration level
Calorie intake
Running featuresrunning cadence, recovery status, training benefit, training load, running program, running index, fitness test
Swimming features
Non-fitness functions 
Smartphone notificationsYes
On-board music storage
Connected pay
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