Code Alarm CATXMLC 5-Button 2-Way LCD Paging Replacement Transmitter Remote 433.92MHz FCC H50TR35 H5OTR35 Code Alarm 5 button 2-way LCD paging replacement metal transmitter remote FCC ID: H50TR35 H5OTR35 AM, superheterodyne (SAW), 433.92MHz, AAA battery powered Programmable to the following models: CA1550, CA1551, CA1552, CA1553, CA6550, CA6551, CA6552, CA6553 You will need to use the system's valet switch (programming/override button) to perform the programming procedure