The ECRA1805F1880B40A from ECHO Microwave is a Band Stop Filter with Stopband Frequency 1805 to 1880 MHz, Bandwidth 75 MHz, Insertion Loss 0.8 dB, Rejection 40 dB. Tags: Module with Connectors, Notch Filter, Cavity Filter. More details for ECRA1805F1880B40A can be seen below.