The 9FD10-4400/U400-O/O from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 4193.7 to 4606.3 MHz, Bandwidth 412.6 MHz (1dB), Center Frequency 4400 MHz, Insertion Loss 0.63 dB, Upper Rejection 40 dB. Tags: Cavity Filter. More details for 9FD10-4400/U400-O/O can be seen below.