Gralab Timer is an electromechanical timer that plugs into wall outlet, and controlled device plugs into timer. Option for continuous-run without removing timer from circuit. Rugged steel case with white finish. 6.5in (165mm) Dial has black markings and hands. Smaller red numerals allow alternate use as a stop-clock. Controls up to 1/3hp motor or 1,200 Watt resistive load.