The ZVBP-4000-S+ from Mini Circuits is a Band Pass Filter with Frequency 3997 to 4003 MHz, Bandwidth 6.0 MHz, Center Frequency 4000 MHz, Insertion Loss 4.5 to 6.5 dB, Upper Rejection 70 to 90 dB. Tags: Module with Connectors, Cavity Filter. More details for ZVBP-4000-S+ can be seen below.