The 6MB/C-400/U20-S2A from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 386.65 to 413.35 MHz, Bandwidth 26.7 MHz (1dB), Center Frequency 400 MHz, Insertion Loss 3.5 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 6MB/C-400/U20-S2A can be seen below.