The BPF-A400 from Mini Circuits is a Band Pass Filter with Frequency 390 to 410 MHz, Bandwidth 20 MHz, Center Frequency 400 MHz, Insertion Loss 2.70 to 2.73 dB, Rejection 20 dB @ 350 and 490 MHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for BPF-A400 can be seen below.