[Safety Device] To Protect Children From Injury, The Electric Knife Sharpener Will Not Operate With The Cover Removed Or Not Properly Installed, Which Means It Won'T Hurt Your Fingers When Your Child Is Using It Alone. The Lightweight Design Makes It Ideal For Use At Home, School Or Office. The Small Size Makes It Easy To Carry. BladeA Replacement Knife Holder Is Also Provided, Which Can Be Replaced By Rotating The Top Safety Cover To Ensure The Durability Of The Pencil Sharpener. [Easy To Use] Press The Pencil To Start Work And Auto Sharpening. Save More Time To Do What Needs To Be Done. [Customer Service] If You Are Not Satisfied With Your Purchase, Please Return It To Us And We Will Solve It Properly For You. We Are Committed To Customer Service! If You Have Any Questions Or Concerns, Please Contact Us!