Probably meant 9CAFS. You want to get one with an "S" in the P/N like 9CAPS. S=Super which has improved programming over those without the "S". If the ad doesn't state "S", call and clarify before ordering. 9CAFS and 9CAPS are basically the same transmitter except one defaults to FM modulation when programing and the other to PCM modulation BUT both will do both. When buying a system the "F" or "P" determine if it comes with a FM or PCM RX.