Polar OH1+
SizeElastic strap
Battery45 mAh Li-pol rechargeable battery
Battery lifeUp to 12 hours of continuous training
Water resistanceup to 30 m
WeightSensor 5 grams, strap 12 grams
SensorHeart rate sensor
ConnectivityBluetooth, ANT+
Internal storageUp to 200 hours training
Heart rateYes
Heart rate variability
Running metricsKeeps track of your heart rate with multiple target zones, calories burned, steps taken and distance.
Swim statisticsSuitable for bathing and swimming. Comes with clip to attach to swimming goggles.
Affiliate link*Amazon
Read moreReview
*Disclosure: We are a professional review site that receives a small commission from sales of certain items, but the price is the same for you. See our affiliate disclosure page for more details.
**All tech specs and images on this page come from manufacturers. These may change over time as manufacturers sometimes update their devices. While we cannot guarantee absolute accuracy of information on this page, we promise to review this content regularly and do our best to bring you the most up-to-date information. To be absolutely sure of tech specs of a particular device, we recommend checking the manufacturer’s website.