The strap unisex T31 Coded transmitter heart rate that is part of the range of heart rate monitors the Polar.

The strap unisex T31 Coded, Polar, and wearing at breast height for measuring in real time the heart rate per minute. Waterproof, the strap unisex, Polar T31 Coded, resists water and sweat for extreme durability.

Designed to offer the maximum comfort during your workout, the belt unisex T31 Coded, is small and lightweight, allowing you to maintain complete freedom of movement.

- Provides up to 2500 hours of operation or five years of use, with a training of 10 hours a week.
- Compatible with the Polar A1, A3, A5, F1, F2, F3, F4, F5, FS1, FS2, FS3, S120, S150 and WM21/WM22.