Slim, light and waterproof, the Polar T31 / T34 Non-Coded Chest Transmitter transmits your heart rate to your wrist unit ECG (electrocardiogram) accurately.

T31 & T34 are both non coded transmission, except the T34 offers a longer range of transmissions and syncs better with gym exercise equimpent. 

Fully water resistant making it great for swimmers, it delivers the most effective measurement of your heart rate while involved in water sports.

Unlike the coded version It doesn’t have the benefit of coding for interference free transmission.

The average battery lifetime of Polar T31 and T31C Transmitter is 2500 hours of use.

When the battery dies, you will need to replace the whole heart rate sensor. 

Measure just under the breasts/chest area

• Medium (25-54 Inches)

Compatible with Polar

• F1
• F2
• F3
• F4
• F5
• FS1
• FS2
• FS3
• A5
• A3
• A1
• Beat
• Pacer
• Target 

Polar T31/T34 Non-Coded Chest Transmitter and Elastic Strap works with most treadmills & elliptical machines. Replacement transmitter for Polar A1,A3, A5

Ca Residents:  for Proposition 65 warning