The Suunto Cadence POD is simple, discreet and easy to fit and adjust. This Mavic-engineered digital wireless cadence sensor provides pedalling pace to your Suunto t3c, t4c, t6c and t3d, t4d and t6d heart rate monitors. In addition to the real-time information you can access your cadence data later on a PC at various level of detail, depending on your HR monitor model. It has a user replaceable battery.