Polar Unite
Tech specs 
Size43.4 x 43.4 x 10.4 mm
MaterialGlass fiber reinforced polymer case. Stainless steel button.
Battery174 mAh Li-pol battery.
Battery lifeBattery life up to 50 h in training mode (Connected GPS and wrist-based heart rate), up to 4 days in watch mode with continuous heart rate tracking.
Water-resistance30 metres (WR30)
Weight32 g with wristband
SensorAccelerometer, Heart rate sensor
DisplayColor touch display (IPS TFT) with ambient light sensor (ALS), resolution 240x204. Asahi glass lens.
Screen size43mm
ColorsBlack, white, pink and blue
OtherPLATFORM: Propriatory
CONNECTIVITY: Bluetooth Low Energy.
Activity tracking 
Calories burnedYes
Heart rateYes (Polar Precision Prime)
Stress & recoveryYes
Pulse Ox
Respiration rate
UV exposure
Skin temperature
Galvanic skin response
Hydration level
Calorie intake
Running features
Swimming features
Other - FitSpark or daily training guide with ready-made workouts that you can do anywhere;
- Sleep Stages which spit out a wealth of stats on your nightly rest, along with a Sleep Score and insights; and
- Nightly Recharge which measures how well your autonomic nervous system (ANS) has recovered. This will let you know whether you should push hard that day or take it easy.
- quick fitness test for continual improvement,
- Serene relaxing experiences
Non-fitness functions 
Smartphone notificationsYes
On-board music storage
Connected pay
Affiliate link*Polar
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