【Product Description】 This is the Seymour Duncan "SA-1" passive pickup for acoustic guitars. It's a soundhole-mounted type with a volume knob. I purchased it through personal import about 27-28 years ago and only tested it a few times. It has never been used for full songs or live performances. It has been stored for a long time, but I have confirmed its operation again recently. Please note that I haven't performed a detailed inspection. The included plastic case has light dirt and a crack at the bottom (cleaned as much as possible). The paper label has faded due to age (originally purple). 【Please Read Before Purchasing】 • This is a vintage part from over 25 years ago. Please consider purchasing only if you understand its condition. • I cannot answer questions regarding size, compatible models, etc. • Please refrain from price negotiations. Immediate purchase is welcome. • While I appreciate multiple purchases, I do not offer combined discounts. I may decline transactions that are based on the assumption of a discount in the future. 【Shipping】 Due to its thickness, I plan to ship via "Yu-Packet Plus." I will pack it carefully and ship it anonymously and promptly. I strive to ensure a safe and secure transaction. Thank you for looking.