We have patent and certificate of this product . The battery was not included in the package .Please prepare 4 pcs batteries by yourself . Instructions: 1.Place 4(AA) batteries in the proper positive(+)/negative(-)direction into the battery holder,press the cover tightly;or powered by your lattop,power bank or any USB charging port. 2.Before using the electric pencil sharpener,please make sure it must be placed flat on the desk;keep the pencil vertically inserting into shapener hole. 3.Hold the pencil verticallu into the sharpener hole and keep downward pressure,and it will trigger the electrical sharper to start function automatically. 4.Keep sharpening the pencil for about 5 seconds before take it out. 5.The sharpener will automatic idle cycles once competing sharpening the pencil,take out the pencil immediately. 6.The product is only suitable for standard wooden pencil(6.5-8mm in diameter)
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