The AE1200L9230 from Anatech Electronics is a Low Pass RF Filter with Frequency DC to 1.2 GHz, 3 dB Cutoff Frequency 1.2 GHz, Insertion Loss 1.2 dB, Rejection 45 dB, Return Loss 12 dB. Tags: Module with Connector. More details for AE1200L9230 can be seen below.