ELEMNT MINI is compatible with the Wahoo RPM Speed Sensor, Wahoo RPM Cadence Sensor, and Wahoo TICKR Heart Rate Monitors.
Note 1: The ELEMNT MINI supports saving only one sensor of a given type at a time - saving multiple speed or cadence sensors is not supported.
Note 2: For specific details on cadence readings while using the TICKR X with the ELEMNT MINI, please see Why is my TICKR X Not Reporting Cadence?