The AM4070B525 from Anatech Electronics is a Band Pass Filter with Frequency 4045.5 to 4095.5 MHz, Bandwidth 50 MHz, Center Frequency 4070.5 MHz, Insertion Loss 3.7 dB, Rejection 30 to 45 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM4070B525 can be seen below.