The 5515BP15C975 from Johanson Technology is a Band Pass Filter with Frequency 4.9 to 5.88 GHz, Bandwidth 975 MHz, Insertion Loss 2.0 dB, Rejection 30 dB, Power 0.5 W. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for 5515BP15C975 can be seen below.