The T-31 features a new elastic design with front snaps that is 25 % smaller and more stable (preventing sliding) and increased comfort with a smaller electrode area. Compatible with most Polar HRMs and backed by two year maintenance free warranty.

FYI: Polar Transmitters are an integral part of Polar Heart Rate Monitors. Positioned on the chest, they measure heart rate per minute in real time. Polar Transmitters are ECG accurate and fully water resistant making them the most effective exercise tools for measuring your heart rate.

Compatible with: all Polar HRMs except Protrainer XT, Protrainer XT Cycle, XTrainer, S510, S520, S710 and S720i. Backed by two year maintenance free warranty