Portable pencil sharpener features a razor blade cutter made of hardened steel for durability and powered by four AA batteries. Shavings fall into a transparent receptacle (150 cubic centimeters) and empty easily for sharpening on the go. For your safety, SafeStart receptacle interlock switch shuts off the motor when receptacle cover is removed. SharpX Portable Electric Pencil Sharpener also has nonslip feet for stability.