The Industrial PLUS Electrical Silent Variable Speed Smart Air Compressor features a Programable Logic Controller that puts you in control. The PLC will give you digital pressure adjustment from 70 psi to 175 psi. It includes a Pressure Lubricated Pump and a HZ display while unit is running and provides programmable timed starts and stops for each day of the week. The PLC also displays maintenance alarms including: low oil shutdown, motor overload shutdown, high voltage or low voltage shutdown and loss of phase shutdown. Digitally displays kW energy savings while unit is running. Built-in air demand sensor automatically increases or decreases the pump speed and air output, based on actual air demand: reducing energy waste and increasing pump and motor life. Variable speed soft start saves up to 7 times starting energy. VSD Smart Technology empowers businesses to install up to a 25HP air compressor that operates on single phase electric. Our Silent Air System reduces stationary compressor DBA ratings by as much as 50%.