I don't know the details. It feels used. It's Showa retro. For those who only want this. I checked the operation by inserting batteries. It worked without any problems. The battery compartment was a little dirty and I cleaned it, but it didn't come off. For those who like it, please. - Model: AS-05 - Type: Electric whetstone - Function: Kitchen sharpener - Power supply: 4 D batteries - Usable items: Kitchen knives, scissors, etc. Thank you for viewing.