The RDUP-1940-1960M-2130-2150M-4313-3W-S-k from Raditek is a RF Duplexer with Frequency 1940 to 1960 MHz / 2130 to 2150 MHz, Band 1 1940 to 1960 MHz, Band 2 2130 to 2150 MHz, Power 3 W, Insertion Loss 2.0 dB. Tags: Surface Mount, Ceramic. More details for RDUP-1940-1960M-2130-2150M-4313-3W-S-k can be seen below.