The WVC-1387.5D1439.5-25M03 from Wevercomm is a RF Duplexer with Frequency 1.37 to 1.4 GHz / 1.42 to 1.45 GHz, Band 1 1.37 to 1.4 GHz, Band 2 1.42 to 1.45 GHz, Power 5 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for WVC-1387.5D1439.5-25M03 can be seen below.