The WTRCT10-2110-2530-15-30-40-4 from Wainwright Instruments is a Tunable Filter with Frequency 2.11 to 2.53 GHz, Bandwidth 15 MHz, Rejection 40 dB, Insertion Loss 1.25 to 1.5 dB, Operating Temperature 15 to 45 Degrees C. Tags: Module with Connectors, Mechanically Controlled. More details for WTRCT10-2110-2530-15-30-40-4 can be seen below.