This lightweight, portable, compact battery operated electric eraser has an impressive 12,000 rpm strong torque motor that is built to last. Use for drafting, architectural plans, arts and crafts, etc. Comfortable hand contour with sleek design, it weights only 2.6 oz. and can fit in a back pocket. Remove marks and lines instantly with a gentle touch. The kit comes with two alkaline AAA batteries, ten blue erasers for drafting ink, ten white erasers for pencil lead, and two eraser chucks. Sakura offers consumers a 90-day limited warranty. Black body color.