The WTRCFV8-3400-3800-20-40-50-1 from Wainwright Instruments is a Tunable Filter with Frequency 3.4 to 3.8 GHz, Tunable Frequency 400 MHz, Bandwidth 20 MHz, Rejection 50 dB, Insertion Loss 1.5 to 2.5 dB. Tags: Module with Connectors, Mechanically Controlled. More details for WTRCFV8-3400-3800-20-40-50-1 can be seen below.