Here's a genuine EMCO LISN direct from the test lab. Unit was last used about 10 years ago when the lab was shut down. It was operational when last used but I am selling as is, as I have no way of testing it. The 3810-2NM is a used LISN from EMCO. A line impedance stabilization network (LISN) device is something engineers use to test radiofrequency (RF) emission and susceptibility. During an electronic equipment test, engineers place the LISN device between an alternating current or direct current power source and the equipment under test. Manufacturer: EMCO Model: 3810/2 NM Description: LISN - Line Impedance Stabilization Network (50Ω, 9kHz - 30MHz) Specifications: Voltage Rating 125 VAC (Line to Ground), Frequency Range 9 kHz to 30 MHz Standards Met FCC 15, VDE 0871, VDE 0875, and EN 55022 RF Connector 50Ω BNC Monitor Inductors 50 µH/250µH Mains & EUT Connections NEMA typical. Current Rating 10 Amps Application/Test Type Power line conducted emissions tests Dimensions 8.7 x 15 x 6 inches / 22.2 x 38.1 x 15.2 cm Weight 12 lbs.