Chamberlain & Liftmaster 041A5456B / 801221 radio module (HF module) The radio module (HF module) 041A5456B / 801221 can be used for controls from Chamberlain & Liftmaster. Frequency 433.92 MHz Superheterodyne receiver (“narrow-band”) Modulation: AM Suitable for: 801702 or 8002E and 041APEC-0008, CB11, CB22, CB124, CB24, CB202 (not EVO MyQ version).