GraLab Portable Umiversal Timer #170A. This 60 second minimum setting timer is used in industry and laboratory settings. Total range is 60 minutes. Accuracy of +/- 0.015% at maximum dial setting. Features large 7 1/4" dial for easy-to-read elapsed time. Inner circle of small numerals permits use as a stopclock. It has built-in buzzer with variable volume control, sturdy polycarbonate/PET case and rubber base pads. Two separate outlet receptacles provide for automatic switching of external appliances. Maximum 750W combined load for both outlets at 120V. One is controlled by switch and can make or break circuit at "zero". The other is independent of selector switch and always breaks circuit at "zero". CSA certified, UL listed.