My radio popper PX transmitter went south this past weekend. It was working normally then just stopped and started flashing an "E2" error. A change of batteries would not clear the error.
Placed a call to RP customer service and the unit must be sent in for repairs.

and since it is out of warranty, the repair could be pricey.
I ordered a new unit yesterday which should be in today.
RP are awesome until they malfunction and you have to rely on CLS, which shortens the working distance.
Just venting over the unexpected two hundred and sixty dollars I had to shell out this week.
