The WTRCT5-670-770-0.2-1.6-50-2 from Wainwright Instruments is a Tunable Filter with Frequency 0.67 to 0.77 GHz, Tunable Frequency 100 MHz, Bandwidth 0.2 MHz, Rejection 50 dB, Insertion Loss 0.5 to 2.5 dB. Tags: Module with Connectors, Mechanically Controlled. More details for WTRCT5-670-770-0.2-1.6-50-2 can be seen below.