The WTRCT8-870-970-0.2-1.6-30-4 from Wainwright Instruments is a Tunable Filter with Frequency 0.87 to 0.97 GHz, Tunable Frequency 100 MHz, Bandwidth 0.2 MHz, Rejection 30 dB, Insertion Loss 0.6 to 1.5 dB. Tags: Module with Connectors, Mechanically Controlled. More details for WTRCT8-870-970-0.2-1.6-30-4 can be seen below.