it only works with their DX3 ground radios, not the DX5 / 6 /etc park flier radios. <span class="info"> </span>
In Horizon Hobby's own words..."The MR3000 is also compatible with Spektrum and JR® DSM2™ aircraft radios. "
Any JR or Spektrum DSM2 or DSMx (which are backwards compatible with DSM2) transmitter will work with them. <br type="_moz"/>