... disconnected before charged.5,The knife sharpener must be placed on a stable work surface when using.6,Do not close the ... . 5,Stainless steel decoration creates a noble, bright appearance, and easy to clean.6,Replaceable sharpening head, extend product life, economic and ... connect the adapter and power supply; last turn on the switch of the sharpener. (a. connected the adapter b. connect the power ...