For DSMX Radio Control Systems, Controls Vehicle via DSMX Transmitter, DSMX Transmitter is Required, Two Antenna Orientations. Compatible with DSMX radio control systems the SPM9745 DSMX RC Remote Receiver from Spektrum gives your RC vehicle the ability to be controlled by an optional DSMX transmitter. You can also use this in an existing DSMX system with a remote receiver connection to provide redundancy to the remote signal. The antennas of this receiver can be oriented in two possible positions for more flexibility in installation. Please note that this is not compatible with DSM2 receivers.