I need another remote in my bedroom and was going to get another MX-800 with the MRF-250?

What is the difference between my MX-800 and the MX-850?

Will a second MRF-250 interfere with each other?

the big difference is the center button in the transport. the 850 is much better. the 850 is graphite/black in color.

as for the 250, they will only interact if you prgram them to. set the codes differently on the back to avoid conflict.

if your going to buy, support those who support this site.

try your local installer/programmer

or online with

damon at proremotes.com
or
mike @surfremote.com

both are willing to help

In the MX-800/850 software, on the top menu, choose 'Program' and then '9 RF Control'. Click the 'Receivers >' button and under where it says 'Receiver ID', click the ID # and then you can set the basestation for that remote to match the basestation in the room. So if you have an MRF250 in the living room with ID 1 and the remote software set to ID 1, you can have another MRF250 in your bedroom with ID 2 and that remote set to ID 2 and you won't have any conflicts.