Spektrum Aircraft Telemetry Brushless RPM Sensor
<p><b>Key Features</b></p><ul> <li>Works with all brushless motors for rpm data through SPM telemetry modules and integrated telemetry receivers</li> <li>Easy installation</li> <li>Telemetry Capable Receiver or Module and Telemetry capable DSMR/DSMX Transmitter required</li> </ul>