Powered by USB cable (included) or 4 x AA batteries (not included) Double-hole design to fit pencil diameters: 6-8mm and 9-12mm Supplied with replaceable sharpening units2 large and 2 standard size Ideal for graphite, charcoal, pastel and coloured pencils Easy to clean by simply removing shavings tray and emptying over a waste bin The PS12-USB is a stylish dual powered (USB or battery) automatic pencil sharpener that provides quick and precise sharpening with ease. Featuring a double-hole design to fit pencil diameters: 6-8mm and 9-12mm. Simple to clean by removing shavings tray and emptying over a waste bin.Designed with auto-off feature that stops operation when shavings cover is removed, also features a safety lid cover over the large hole.Supplied with 2 replaceable blade units that are easily changeable. Features Hand orientation Ambidextrous Removable container Yes Pencil diameter (max) 1.2 cm Pencil diameter (min) 6 mm Product colour Black, Transparent Type Electric pencil sh