Powered by 4 AA batteries or a ac adapter, the Fusion 2 has a professional helical blade to aid quick and accurate sharpening. With a safety shut off feature which prevents the motor running when the shaving tray is removed, this stylish sharpener is a great addition to any desktop.Battery or mains operated, pencil point sharpness selector - from blunt to sharp, broken tip removal button, for standard (8mm) and large (10mm) diameter pencils, option of 6 volt PSU (Power Supply Unit) include or 4xAA batteries (not supplied)