"The ETA System ETA-20M is a 20A Power Conditioner and AC Spike Suppressor that is designed to be used as a standalone unit or in conjunction with an ECS unit up to 1000ft away. The ETA-20M features AC Spike and Surge Suppression, AC Mains Voltage monitoring, EVS circuitry, and Remote Activation. In addition, the ETA-20M features noise filtering for removing unwanted Radio Frequency Interference (RFI) and EMI filters to reduce noise from Electromagnetic Interference (EMI) caused by items such as electric motors or switching power supplies. The ETA-20M is designed to be conveniently housed in the ECM-RACEWY6 for the addition of multiple outlets directly connected to the AC mains from the electrical panel. "