Kai House The sharpener [AP-5301] electric knife sharpener [Size] width of about 10.8  depth 10.8  height 11cm [code] length about 2m [weight] about 670g (including AC adapter) Material body: ABS resin / Ken stone (rough): White nitrous random / Ken Stone (finish): White alundum / slip: silicone rubber [power supply] AC100V 50 / 60Hz [at rated] [power consumption] 20W 5 minutes [accessory] AC adapter Please note:  Togeru knives stainless steel, steel, interrupt a double-edged knife  ceramic is also double-edged, titanium knives, fruit knife is not thorn.  thorn not knife, single-edged of Japanese knives (knife, sashimi knife, etc.), special sharpening of knives (bread knife, frozen knife) kitchen knife other than cutlery (scissors, tools, cutter, etc.) 5 minutes do not the above continuous operation. Use firmly wipe off the knife of moisture Japanese manual URL (PDF):http://www.kai-group.com/contents_file/pdf/16/AP5301_manual.pdf