The EMA8G2357P50F40D from ECHO Microwave is a Band Pass Filter with Frequency 2.33 to 2.38 GHz, Insertion Loss 3 dB, Rejection 40 dB @ 2307 MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8G2357P50F40D can be seen below.