【Manufacturer】buffalo 【Model Number】BSMBW335NBK Please refer to the manufacturer's website for detailed specifications. https://www.buffalo.jp/product/detail/bsmbw335nbk.html - Purchased new in September, but I am selling it because it didn't fit my hand. - This is a used item, so there may be minor scratches from use. - No pets, non-smoking environment, stored at home. - In the unlikely event of an initial defect (e.g., the power doesn't turn on / the power turns off frequently), please let me know. I will address it. (Please see my profile for details.) Please feel free to comment if you have any questions. Thank you for looking. Power source...Battery-powered