The WTRCT10-2500-2800-20-40-40M-4 from Wainwright Instruments is a Tunable Filter with Frequency 2.5 to 2.8 GHz, Tunable Frequency 300 MHz, Bandwidth 20 MHz, Rejection 40 dB, Insertion Loss 1.25 to 2 dB. Tags: Module with Connectors, Digitally Controlled. More details for WTRCT10-2500-2800-20-40-40M-4 can be seen below.