Code Alarm CATX4 4-Button Replacement Transmitter Remote 433.92MHz FCC H50T49 H5OT49 ***NEW VERSION CAT4P*** Code Alarm 4 button replacement transmitter remote (Replacement for CATX50) FCC ID: H50T49 H5OT49 (Replacement for H50T43 H5OT43) AM, superheterodyne (SAW), 433.92MHz, red LED Programmable to the folloing models: CA1050, CA1051, CA1053, CA2050, CA2051, CA5050, CA5051, CA5053, CA5054 You will need to use the system's valet switch (programming/override button) to perform the programming procedure