The CBP-1953AF+ from Mini Circuits is a Band Pass Filter with Frequency 1858 to 2048 MHz, Center Frequency 1953 MHz, Insertion Loss 3 to 3.5 dB, Power 5 W, VSWR 1.78:1, 2.00:1. Tags: Surface Mount, Ceramic Filter. More details for CBP-1953AF+ can be seen below.