Code Alarm CAT4 4-Button Replacement Transmitter Remote 915MHz FCC H50T59 H5OT59 Code Alarm 4 button replacement transmitter remote (Replaced by CAT4M) (NOT for CAT4P) FCC ID: H50T59 H5OT59 FHSS, Spread spectrum technology (SST), 915MHz, red LED Programmable to the following models: CA1554, CA1555, CA5154, CA5155, CA5354, CA5554, CA6154, CA6155, CA6554, CA6555; CA4BS, CA2LED5, CA2LCD5, CA2RELCD5 You will need to use the system's valet switch (programming/override button) to perform the programming procedure