The 2500BP15M400 from Johanson Technology is a Band Pass Filter with Frequency 2.3 to 2.7 GHz, Bandwidth 400 MHz, Insertion Loss 2.4 dB, Rejection 15 dB, Power 0.5 W. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for 2500BP15M400 can be seen below.