The AE2.5L8837 from Anatech Electronics is a Low Pass RF Filter with Frequency DC to 1.2 MHz, 3 dB Cutoff Frequency 2.5 MHz, Insertion Loss 0.5 to 3.5 dB, Rejection 52 dB, Return Loss 15 dB. Tags: Module with Connector, Lumped Component Filter. More details for AE2.5L8837 can be seen below.