The WTRCFV8-3550-3950-20-40-40-1 from Wainwright Instruments is a Tunable Filter with Frequency 3.55 to 3.95 GHz, Tunable Frequency 400 MHz, Bandwidth 20 MHz, Rejection 40 dB, Insertion Loss 1.5 to 2 dB. Tags: Module with Connectors, Mechanically Controlled. More details for WTRCFV8-3550-3950-20-40-40-1 can be seen below.