The WTRCT10-2570-2870-5-12-40M-3 from Wainwright Instruments is a Tunable Filter with Frequency 2.57 to 2.87 GHz, Bandwidth 5 MHz, Rejection 40 dB, Insertion Loss 1.25 to 2.5 dB, Supply Voltage 23 to 32 V DC. Tags: Module with Connectors, Digitally Controlled. More details for WTRCT10-2570-2870-5-12-40M-3 can be seen below.