Code Alarm CATXMSS 4-Button Replacement Transmitter Remote 915MHz FCC H50T48 H5OT48 Code Alarm 4 button replacement metal transmitter remote FCC ID: H50T48 H5OT48 FHSS, spread spectrum technology (SST), 915MHz, blue LED Programmable to the following models: CA5153SST, CA5550SST, CA5553SST, CA6551SST, CA6552SST, CA6553SST You will need to use the system's valet switch (programming/override button) to perform the programming procedure