Just in case somebody would still want to know: I just received one OrangeRX and it will not bind to DX3R. Tried with a DSM1 Losi transmitter as well but no luck. They are really programmed only for air transmitters.

The receiver will sense the binding process and the led will change its blinking mode, but in the end it will not lock on to the transmitter (led goes off instead of full on).