The 4FS10-11500/U840-P/P-2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 10935.5 to 12064.5 MHz, Bandwidth 1129 MHz (1dB), Center Frequency 11500 MHz, Insertion Loss 0.42 dB, Upper Rejection 65 dB. Tags: Cavity Filter. More details for 4FS10-11500/U840-P/P-2 can be seen below.