The WBLB-T-BP-4200-400-11C from A-Info is a Band Pass Filter with Frequency 4 to 4.4 GHz, Insertion Loss 0.8 dB, Rejection 50 to 70 dB, VSWR 1.50:1, Operating_Temperature -40 to 80 Degree C. Tags: Module with Connectors, Cavity Filter. More details for WBLB-T-BP-4200-400-11C can be seen below.