This is a used "Rare Earth Mic Blend" active pickup for acoustic guitars by FISHMAN. It has been used sparingly and is in relatively clean condition. The cork (cushioning material) on the wing parts used to secure it to the guitar is a bit thin on both the top and bottom, so we recommend replacing the cork or adding some thickness. It may be fine if you can clamp it in place on your guitar as is, but if the cork is not thick enough and you can't secure it, be careful not to force the screws, as the nut (gold-colored part) that receives the screws may come out of the movable wing (the lower wing). (There is a stopper on the movable wing, and it will stop moving beyond a certain point. If you still tighten the screws, only the nut will be pulled by the screws and come out.) Operation has been confirmed, and it has been lightly cleaned. *Batteries are not included, so please prepare your own. Please refer to the official website for product details. ▼FISHMAN (Rare Earth Blend Soundhole Pickup) https://www.fishmanjp.com/products/pickup/rare_earth_blend.php You can download the instruction manual from the following link. ▼User Guide Rare Earth https://www.fishmanjp.com/support/user_guides/rare_earth.pdf Thank you very much. *This item is also sold on other sites. Please note that we may remove the listing without prior notice if it is sold out.