GraLab Model 300 photography and darkroom 60-minute timer has a 6.5” face (Diameter), with luminous numerals, dial, and hands for enhanced visibility in darkrooms, two hands for dual settings, and two outlets for automatic switching between an enlarger or printer and a safety light. Two hands allow the timer to be set by minutes for film processing, or seconds for enlarging, or a combination of minutes and seconds. The Model 300 timer has a 600-watt capacity for operation with most film processing equipment. The electric motor provides + or - .015% accuracy. The timer has a nonconductive plastic case and rubber base pads to help protect against impact, chemicals, moisture, and electrical shock, with a recessed handle for easy gripping, and keyholes for wall mounting. The timer has an automatic alarm with adjustable volume. Electromechanical timers are commonly used in laboratory, darkroom, restaurant, manufacturing, and sporting event settings. The GraLab Model 300 timer has 6.5” face (Diameter), measures 7.5 x 7.5 x 2.5 inches (H x W x D), and weighs 3.0 lb. (H is height, the vertical distance from lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.) The Model 300 meets Underwriters Laboratories (UL) and Underwriters Laboratories of Canada (ULC) product safety standards. The input voltages are 100 to 130 VAC, 50 or 60 Hz; 210 to 250 VAC, 50 Hz; AC outlet power rating is at 120 VAC. GraLab manufactures electromechanical timers. The company, headquartered in Centerville, OH, meets International Organization for Standardization (ISO) 9001:2000 standards.