The ELHA1800E50F from ECHO Microwave is a RF High Pass Filter with Frequency 1800 to 2600 MHz, Bandwidth 800 MHz, Insertion Loss 2.5 dB, Rejection 50 dB (400-1600MHz), Return Loss 15 dB. Tags: Surface Mount, Lumped Component Filter. More details for ELHA1800E50F can be seen below.