Ohuhu Electric Automatic Pencil Sharpener, Special Design for Colored Pencils 2016 version special design for colored pencils: Sharp durable sk5 steel blade & large easy-clean shavings tray with faster 100% kid safe- automatic safety lock function function: The pencil sharpener stops operation once the shaving tray is removed Never over-sharpening - automatic idling once the pencil tip has been shaved within 0.3-0.5 mm/0.01"-0.02" Replaceable sharpener core design - greatly extending the service life (1 x replacement core included) Multiple power sources: Can be powered by either USB (wire included) or 4 AA batteries (not included)