The ECRA1575R4B70B from ECHO Microwave is a Band Stop Filter with Stopband Frequency 1573.42 to 1577.42 MHz, Bandwidth 4 MHz, Insertion Loss 1.0 dB ( 900-1550, 1611-2000 MHz), Rejection 70 dB. Tags: Module with Connectors, Ceramic Filter. More details for ECRA1575R4B70B can be seen below.