The EDEA4F1539P42J40A from ECHO Microwave is a Band Pass Filter with Frequency 1.52 to 1.56 GHz, Insertion Loss 5 dB, Rejection 40 dB @ 1625 to 1675MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EDEA4F1539P42J40A can be seen below.