The ZX75BP-B1230-S+ from Mini Circuits is a Band Pass Filter with Frequency 1120 to 1340 MHz, Center Frequency 1230 MHz, Insertion Loss 0.9 to 1.8 dB, Upper Rejection 20 to 50 dB, Lower Rejection 20 to 70 dB. Tags: Module with Connectors, Ceramic Filter. More details for ZX75BP-B1230-S+ can be seen below.