Thank you for viewing. This is the L.R. Baggs Dual Source acoustic guitar pickup. It was originally installed in an electric nylon-string guitar made by Shunpei Nishino, which I purchased used about eight years ago. After purchasing it, I immediately replaced it with another pickup (the replacement was done at Kurosawa Gakki in Ochanomizu) and stored it in its case for a long time. I found it while organizing my room, so I'm putting it up for sale. It was working fine before the replacement, but I can't confirm if it works at the moment, so I'm selling it as "junk." I'm a music enthusiast, but I'm not familiar with small parts, so please refer to the photos I've uploaded. Sound House has details about the product, so please refer to this link: https://www.soundhouse.co.jp/products/detail/item/241111/ Please consider that this is a junk item when purchasing, and no returns or refunds will be accepted.