The CER0527B from CTS Electronic Components is a Band Pass Filter with Frequency 2.5 to 2.69 GHz, Bandwidth 194 MHz, Insertion Loss Less than 1.8 dB, Rejection 25 to 57 dB, Power 2 to 20 W. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for CER0527B can be seen below.