# Polar H10 XS–S Heart Rate Sensor

Source: https://www.ranked10.co.uk/fitness/best-heart-rate-monitors/polar-h10-heart-rate-sensor-65w2
Ranked #4 in "Best Heart Rate Monitors 2026: 10 Ranked, Three Spec Sheets Wrong": https://www.ranked10.co.uk/fitness/best-heart-rate-monitors

- Price: £62.49 (checked on Amazon UK on 2026-09-17)
- Amazon rating: 4.2 from 1,799 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B07PM565W2?tag=ranked10-21

The Polar H10 sits at number four in this guide. It is a chest strap heart rate sensor at £62.49, rated 4.2 out of 5 across 1,799 ratings, and its spec table gives the sensor type as "Chest Strap" — in a list where two other chest straps are labelled "Optical", this is the label that matches the object it describes.

The same listing then disagrees with itself about fit. The Item Highlight says "Fits 54–66 cm chest", while the first bullet gives the XS–S strap as 62–74 cm, with M–XXL listed at 75–115 cm and XXXL at 116–155 cm sold separately. That is two different ranges for the same strap, starting 8 cm apart. The rating is the number that stays consistent: 66% of the 1,799 ratings are five star, but 15% are one or two star. Everything on this page is taken from the Amazon listing, not from any testing we have carried out.

## Specification

| Field | Value |
|---|---|
| Price | £62.49 |
| Rating | 4.2 out of 5 from 1,799 ratings |
| Rating spread | 66% five star, 11% four star, 8% three star, 4% two star, 11% one star |
| Sensor Type | Chest Strap |
| Item Highlight | Fits 54–66 cm chest, ECG/EKG accuracy, HRV tracking, Waterproof |
| Strap sizes (bullet list) | XS–S 62–74 cm; M–XXL 75–115 cm; XXXL 116–155 cm (sold separately) |
| Connectivity | Bluetooth, ANT+ or 5 kHz; supports dual Bluetooth and ANT+ connections |
| Battery Average Life | 400 hours, CR 2025 |

## Questions people ask

**Which chest size does this version fit?**

This is the XS–S version, given in the listing as 62–74 cm. The same listing also lists M–XXL at 75–115 cm and XXXL at 116–155 cm, sold separately.

**Why does the listing show a different chest range in the Item Highlight?**

It does — the Item Highlight says "Fits 54–66 cm chest" while the bullet for this XS–S strap says 62–74 cm. Both figures appear on the same Polar H10 listing.

**What can the Polar H10 connect to?**

The listing says Bluetooth, ANT+ or 5 kHz, to smartwatches, fitness apps such as Peloton, Strava and Nike, or gym equipment, and that it supports dual Bluetooth and ANT+ connections at the same time.

**Can I use it without a phone or watch?**

Yes. The listing states there is internal memory for one training session without a phone or watch.

**Is the Polar H10 waterproof?**

The listing describes it as waterproof up to 30 m and names swimming among the sports it suits.

**How long does the battery last?**

The listing gives a CR 2025 battery with an average life of 400 hours, and notes the strap should be replaced roughly every 6 months for best performance.