... ,Please read all instructions carefully before use.2,To protect against the risk of electronic shock, do ... be placed on a stable work surface when using.6,Do not close the hot objects.7, ... in use or cleaning. Features and Functions1,Applicable to kitchen knives of various materials and ceramic knives. ... 7,Applicable voltage 100-240 VAC, 50HZ—60HZ.How to useFirst ensure the power switch of the sharpener is ...