I am designing a PIC controlled data acqusition system that uses multiple PIC's and 900MHZ transmitters to send bursts of data periodically to a single receiver for parsin g and logging. I intend to develop the transmitter as a seperate box that has a power connector a data input connector and an antenna connector and get FCC certification for it. I want to b e able to interface it with various PIC based front ends without requiring re-certificatio n. My customers will embed this system in to their equipment for use internally (i.e. not resell this equipment with my stuff in it). Can my customers do this without needing to re-certify the ir equipment? My product will be buried inside his equipment, not bolted on the outside. - -Mark __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.com