The MA4C2745P110C20D from ECHO Microwave is a Band Pass Filter with Frequency 2.69 to 2.8 GHz, Insertion Loss 1.5 dB, Rejection 20 to 30 dB, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for MA4C2745P110C20D can be seen below.