The ZVBP-4450-S+ from Mini Circuits is a Band Pass Filter with Frequency 4050 to 4850 MHz, Center Frequency 4450 MHz, Insertion Loss 0.3 to 0.6 dB, Upper Rejection 50 to 61 dB, Lower Rejection 50 to 57 dB. Tags: Module with Connectors, Cavity Filter. More details for ZVBP-4450-S+ can be seen below.