The CSI-FLTR-12NF10-815/860 from Westell Technologies is a Band Pass Filter with Frequency 809 to 866 MHz, Bandwidth 57 MHz, Insertion Loss 2.0 dB, Power 10 W, Ripple 1.2 dB. Tags: Module with Connectors. More details for CSI-FLTR-12NF10-815/860 can be seen below.