"Also, would there be any delay in relaying the FM signal from source transmitter to relay transmitter to receiver?" Almost certainly but not one that you'd worry about. Regards. Tristram Llewellyn Sight and Sound Technology Technical Support www.sightandsound.co.uk ** Going on holiday and want to halt messages? Send a message to:- ** access-uk-request@xxxxxxxxxxxxx ** and in the Subject line type ** vacation ## d ** where ## is the number of days followed by d for days. ** For other things like digest mode, send a message, to ** access-uk-request@xxxxxxxxxxxxx with the Subject:- faq