The WTRCQV8-3600-3900-20-100-50 from Wainwright Instruments is a Tunable Filter with Frequency 3.6 to 3.9 GHz, Bandwidth 20 MHz, Rejection 50 dB, Insertion Loss 0.75 to 1.5 dB, Operating Temperature 15 to 45 Degrees C. Tags: Module with Connectors, Mechanically Controlled. More details for WTRCQV8-3600-3900-20-100-50 can be seen below.