The CER0809B from CTS Electronic Components is a Band Pass Filter with Frequency 2.52 to 2.67 GHz, Bandwidth 150 MHz, Insertion Loss Less than 2.5 dB, Rejection 15 to 27 dB, Power 1 to 10 W. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for CER0809B can be seen below.