The 2376 from KR Electronics (A Division of NIC) is a Low Pass RF Filter with Frequency DC to 0.06 kHz, Stopband Frequency 180 Hz, 3 dB Cutoff Frequency 0.06 kHz, Lower Rejection 40 dB@180 Hz, Upper Rejection 3 dB@180 Hz. Tags: Plug In. More details for 2376 can be seen below.