The ZABP-550-S+ from Mini Circuits is a Band Pass Filter with Frequency 100 to 1000 MHz, Center Frequency 550 MHz, Insertion Loss 1.1 to 2.2 dB, Upper Rejection 30 to 40 dB, Lower Rejection 40 to 50 dB. Tags: Module with Connectors, Lumped Component Filter. More details for ZABP-550-S+ can be seen below.