The WTRCQV8-3400-3700-20-100-50-2 from Wainwright Instruments is a Tunable Filter with Frequency 3.4 to 3.7 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 WTRCQV8-3400-3700-20-100-50-2 can be seen below.