POLAR chest strap without sensor (XS-S) Pro

The POLAR Pro chest strap replaces the Soft strap. It ensures a longer lifespan for the sensor electrodes, which are supplemented with a conductive rubber layer containing metallic particles, providing better protection against corrosion. It unfastens at the side. The transmitter is attached with two press studs. The POLAR Pro chest strap has a lifespan of approximately 1–2 years when used for an hour every day. A malfunctioning strap may manifest as abnormally high HR values and a loss of communication between the transmitter and the receiver.