In response to feedback from DMSX transmitter owners, Horizon Hobby have discovered that in some “rare instances”, DSMX equipped transmitters with certain product ID (PID) codes may have a backwards compatibility issue that could cause a ‘hold’ when used with the following superseded DSM2 receivers: AR500, AR6100, AR6100E, AR6110, AR6110E, AR6200 and AR6300.

The issue doesn’t affect 'DSM2 only' transmitters and those affected must return their transmitter to Horizon Hobby UK for a free firmware upgrade. Full details of the free collection and return service can be found at or by calling 01279 641097.