The RDUP-100-400M-700-3000M-4417-1W-S-k from Raditek is a RF Duplexer with Frequency 100 to 400 MHz / 700 to 3000 MHz, Band 1 100 to 400 MHz, Band 2 700 to 3000 MHz, Power 1 W, Insertion Loss 3 to 5 dB. Tags: Surface Mount, Ceramic. More details for RDUP-100-400M-700-3000M-4417-1W-S-k can be seen below.