This is an acoustic guitar pickup that is almost unavailable in Japan. I imported it privately from the American musical instrument store, Sweetwater. It's a passive type that doesn't require a battery. It's humbucking, but the sound quality is like a single-coil. After actually playing it, I realized that it's a magnetic pickup that, like the L.R. Baggs M1, picks up the vibration of the top while still being magnetic. I was looking for a type that doesn't pick up the vibration of the top, so it doesn't suit my style, and I'm putting it up for sale. It arrived just a few days ago and is almost new. I have only tested it in a passive environment. Below are the details in Japanese, so please check them. Suggested retail price: ¥42,000 (excluding tax) https://www.deviser.co.jp/products/quiet-coil-nc-passive-acoustic-guitar-soundhole-pickup There is a reference video from overseas. https://youtu.be/mrVKSn-oPlc?si=NhpYqpGL6hmOCbzR&t=299