What are the various combinations of X10 wireless receivers and transmitters that work together?
WIRELESS TRANSMITTER (X10:RT504, LEV:6313, RS:61-2560) will work with WIRELESS RECEIVER (X10:RR501, LEV:6314) or WIRELESS RECEIVER (X10:TM751). To control 16 units, use two X10:RR501 (one set to 1-8, the other set to 9-16) or one X10:TM751. The surface mount two, three and four button WIRELESS TRANSMITTERS (X10:684, X10:724, X10:694 respectively) will work for all codes with WIRELESS RECEIVER (X10:TM751). When used with WIRELESS RECEIVER (X10:RR501, LEV:6314), respectively they will only work for units 1-2, 1-3, or 1-4 if the receiver is set for 1-8; or 9-10, 9-11, or 9-12 if the receiver is set for 9-16. The WIRELESS TRANSMITTER (X10:KC674) works for all codes with WIRELESS RECEIVER (X10:TM751). With the WIRELESS RECEIVER (X10:RR501, LEV:6314), it will only work for units 1-2 with the reciever set on 1-8. All the transmitters work with X10 security systems to some degree. Check before investing. You should not use the WIRELESS RECEIVER (X10:TM751 or X10:RR501, LEV:6314) if you have an