Doorking 1601 operator is designed for single lane (14 ft. max) vehicular traffic control in high traffic commercial and industrial applications. The Doorking 1601 operator is designed so that it can be mounted on either the left or right hand side of the roadway. The operator can be equipped with a DC convenience open package (optional) that will automatically raise the arm in the event of a power outage. Model 1601 1/2 HP continuous-duty motor. 115, 230*, 460* VAC. (*230 and 460 volt units use a step-down power transformer to achieve 115 volt operating voltage.) 40:1 gear-box running in a continuous oil bath. Arm rotates 90° in approximately 1.5 seconds. Class II, III and IV applications. Dimensions (operator only): 15.25"W x 39.75"H x 14.75"D.