The WTRCT5-870-970-0.2-1.6-40-4 from Wainwright Instruments is a Tunable Filter with Frequency 0.87 to 0.97 GHz, Tunable Frequency 100 MHz, Bandwidth 0.2 MHz, Rejection 40 dB, Insertion Loss 0.5 to 2 dB. Tags: Module with Connectors, Mechanically Controlled. More details for WTRCT5-870-970-0.2-1.6-40-4 can be seen below.