Thank you for viewing. I will not respond to price negotiations. I will not reply to comments regarding price negotiations. This is the Roland AEROPHONE mini [AE-01]. Please check the product homepage for details. https://www.roland.com/jp/products/aerophone_mini/ It has hardly been used and has no noticeable scratches or stains, but please understand that it has been in someone's possession before purchasing. When using batteries instead of USB power, four AA nickel-metal hydride batteries are required separately. Please be aware. Thank you.