The ERZ-BPF-0210-0380-1.9 from ERZIA is a Band Pass Filter with Frequency 2.1 to 3.8 GHz, Insertion Loss 1 to 1.9 dB, Rejection 30 dB @1.89 GHz & 4.15 GHz, 60 [email protected] GHz & 4.26 GHz, Power 10 W, Return Loss 12.3 to 15 dB. Tags: Module with Connectors, Suspended Substrate Filter. More details for ERZ-BPF-0210-0380-1.9 can be seen below.