The CAS SW-1W Series Bench Scale is a well built, Water Resistant, compact scale that will stand up to years of use. Compact in design and easy to use portion control scale for use in a variety of applications. AC or battery operated Legal for trade (SW-1 and SW-1W Only). Use in restaurants, meat & poultry plants, bakeries, farmer's markets, and more. Achieve precise measurements with the SW-1W's dual range technology. Its simple interface allows you to switch units easily to lbs, oz, kg, or g.