The 2364 from KR Electronics (A Division of NIC) is a Low Pass RF Filter with Frequency DC to 0.005 kHz, Stopband Frequency 16 Hz, 3 dB Cutoff Frequency 0.005 kHz, Lower Rejection 40 dB@16 Hz, Upper Rejection 3 dB@16 Hz. Tags: Plug In. More details for 2364 can be seen below.