The 3FD10-4940/U30-O/O from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 4906.95 to 4973.05 MHz, Bandwidth 66.1 MHz (1dB), Center Frequency 4940 MHz, Lower Rejection 60 dB. Tags: Cavity Filter. More details for 3FD10-4940/U30-O/O can be seen below.