The CSI-FLTR-5NF10-816/861 from Westell Technologies is a Band Pass Filter with Frequency 813.5 to 863.5 MHz, Bandwidth 50 MHz, Insertion Loss 2.0 dB, Power 10 W, Ripple 1.2 dB. Tags: Module with Connectors. More details for CSI-FLTR-5NF10-816/861 can be seen below.