The ELELA3000C20A from ECHO Microwave is a Low Pass RF Filter with Frequency 1000 to 3000 MHz, Bandwidth 2000 MHz, Insertion Loss 1.5 dB, Rejection 20 min. @ 3500MHz, Return Loss 14 dB. Tags: Module with Connector, Lumped Component Filter. More details for ELELA3000C20A can be seen below.