Polar WearLink® / WearLink®+ transmitter has two parts: the WearLink/WearLink®+ chest strap and the WearLink connector.
See pictures to fasten or unfasten WearLink®+ Transmitter.
See pictures to fasten or unfasten WearLink® Transmitter.
With the WearLink® you may need to apply some force to unfasten the transmitter strap from the connector, especially when the WearLink is new.
The clips are designed to withstand the twisting force. Unfastening will not damage the transmitter.