Polar T31 Coded Chest Transmitter and Elastic Strap

Price: $50.54
(as of Sep 28, 2026 03:44:17 UTC – Details)


Slim, light and fully water resistant transmitter that prevents cross-talk from other electrical devices for accurate measurement.
Transmits heart rate data to Polar heart rate monitors using 5kHz transmission and compatible gym equipment. Compatible heart rate monitors include, but are not limited to: FT1, FT2, FT4, FT7, FT40, FT60, FT80, RS100, RS300X, RS400, RCX5
Compatible products:Elastic straps.Individually coded to pick up your heart rate monitor and not others nearby. This eliminates cross-talk with other electronic devices in the same area.
Slim, lightweight, and waterproof design
Fits 25 to 54 inch chest size
Average battery lifetime is 2500 hours of use. Non user replaceable battery
Customers find the biometric monitor works well with various equipment, including treadmills, bikes, and Precor Elliptical machines, and appreciate its comfort and heart rate monitoring capabilities. The durability and value for money receive mixed reviews – while some find it long-lasting and good value, others report it doesn’t last and consider it a waste of money. The battery life is a concern as it’s not user-replaceable and gets shorter over time, and while some find it accurate, others report inaccurate readings. The connectivity receives mixed feedback, with customers noting it connects automatically to gym equipment but has compatibility issues with certain systems.