Code Alarm CATLCD 5-Button 2-Way LCD Paging Replacement Transmitter Remote 915MHz FCC H50TR51 H5OTR51 Code Alarm 5 button 2-way LCD paging replacement metal transmitter remote (Replacement for CATRLCD) FCC ID: H50TR51 H5OTR51 (Replacement for H50TR64 H5OTR64) FHSS, spread spectrum technology (SST), 915MHz, AAA battery powered Programmable to the following models: CA1554, CA1555, CA5554, CA6554, CA6555; CA2LCD5 You will need to use the system's valet switch (programming/override button) to perform the programming procedure