The Air-Eagle SR Plus is an RF system designed for short to medium range wireless remote control of electrical apparatus in a variety of industrial applications. Systems can consist of any number of receivers and handheld or contact input transmitters working together to create a short to medium range radio frequency system that operates hazardous or hard-to-reach equipment from safe, convenient locations. Eight user selectable frequencies allow multiple systems to be used in the same area without interference. This transmitter is equipped to send 8 independent dry-contact input commands to an Air-Eagle SR Plus receiver located up to 600 feet away. Longer ranges can be achieved with external antennas. The Air-Eagle SR Plus transmitter utilizes spread-spectrum technology and provides the utmost in security and reliability.