Polar H10 Hartslagmeter Borstband Rood Beat M-XXL

I was very happy with this device until the recent firmware update. After updating, it no longer works with my Technogym treadmill. Technical support has been unresponsive and not helpful, and there’s no way to roll back to the previous firmware. Until compatibility is fixed or a rollback option is provided, I can’t use it with my treadmill and wouldn’t recommend it to Technogym users.

Simple and effective. I purchased this to get a more accurate HR reading on my Apple Watch while skate skiing and uphill ski skinning, both of which have arm movements that could cause cadence errors in wrist-based monitor. It has worked very well for this purpose.

Paired quickly to Apple Watch. I got it to have better cold temp heart rate readings. Apple Watch is terrible at heart beat reading in cold temps.

The Polar H10 has been rock-solid for me so far. It connects instantly to the Apple Watch Ultra, stays stable during hard efforts, and gives noticeably cleaner data than the wrist sensor.

Very limited lifespan. It is no longer reading accurately and is outside the warranty period. Unlike Garmin, customer service is non existent. Pass.