You'll need to buy an IR543 from X-10. The IR543 receives the IR command from the MX-900 and passes that to the appropriate lights or appliances etc..
What I did was attach one of the flashers from my MRF-250 to the front of the IR543, so my MX-900/MRF250 operates all my lighting from anywhere. Hope this helped.
"People are very open-minded about new things -- as long as they're exactly like the old ones" Kettering
