Spektrum receivers with dx4s
#2
All Spektrum rx's are suppose to work. The off brand Orange are having problems though and don't work.
#3
Some will some won't it has something to do with that new feature that comes in the dx4r pro
#4
If you recently purchased a DX4S, due to EU regulations, it will only bind with DSM2 and DSMR receivers. It will no longer bind with older DSM or Marine receivers.