The Derwent Battery Operated Twin Hole Sharpener can sharpen both large (9-12 mm) and small (6-8 mm) diameter pencils … perfect for achieving a sharp point quickly! The high-quality, durable blades can withstand hours of sharpening, and a broken tip remover ensures any blockages are dealt with quickly. The visible reservoir captures pencil shavings and these can be disposed of easily thanks to the removable cover. A compact-sized sharpener for on-the-go creativity.Specifications: requires 4 x AA batteries (not included) alkaline batteries are recommended do not use rechargeable batteries