This Rapesco PS12-USB Electric Pencil Sharpener in Black and Transparent offers quick and precise sharpening with ease. It is a stylish dual-powered automatic pencil sharpener, running on either USB or battery power. The sharpener features a double-hole design to accommodate pencil diameters of 6-8mm and 9-12mm. Cleaning is simple; just remove the shavings tray and empty it. It is designed with an auto-off feature that stops operation when the shavings cover is removed, and also includes a safety lid cover over the large hole. The sharpener comes with 2 replaceable blade units that are easily changeable and includes a 2-year guarantee.