The R03-M0483-01 from SRTechnology Corporate is a Multiplexer with Frequency 483 to 487.775 MHz, Insertion Loss < 3 dB, Isolation 70 dB, Power handling 10 W (RX), 50 W (TX), Return Loss >20 dB. Tags: Module with Connectors. More details for R03-M0483-01 can be seen below.