Note:
1.The sharpener can't operate without a power source, either USB connection, Batteries or AC power cord.
2.Don't operate by USB connection and battery at the same time. Remove the USB connection if operating by batteries.
3.To use, please hold unit firmly to keep it from moving, then insert the pencil gently to start the sharpening Don't force or jam the pencil in.
Hold for approximately a few seconds until the pencil has been sharpened well. Take out the pencil vertically, it will automatically shut off.