This is the Sound Mirror from Mizuho Gakki. It allows you to hear the sound of your acoustic guitar well. I believe the retail price was around 20,000 yen. ~Manufacturer's Description~ The Sound Mirror is a soundboard that allows you to enjoy the true sound of your guitar while you play. Have you ever felt that your guitar sounded better when someone else played it? Unfortunately, you can't hear the true sound that projects forward when you play yourself. When you play in front of this Sound Mirror, you'll rediscover your guitar, even one you've played for years, thinking, "Wow, it sounded this good?" The acrylic panel has a scratch-resistant protector, so it won't get scratched even if you accidentally bump your guitar against it. It's a guitar companion you can use with peace of mind for a long time. http://mizuhogakki.com/5_product.html The images and description are from when I purchased the product.