Thank you for viewing! This is the Logitech wireless trackball mouse, MX ERGO. Product Condition: * Brand new, unopened. * After purchase, I didn't have a chance to use it, and it has been stored in a dark place. * There are no noticeable scratches or dents on the box. However, as it was purchased in a store, there may be slight scratches or initial imperfections on the outer box. Please refrain from purchasing if you are looking for a perfect item. MX ERGO's Appeal: * Comfortable ergonomic design: The shape fits in the palm of your hand, reducing strain on the wrist and arm, and is designed to prevent fatigue even during long hours of work. * High-precision tracking: Precise tracking allows for cursor control as intended. * Dual connectivity: Connects via both USB receiver and Bluetooth Low Energy. You can connect to up to two devices, and with the Logicool Flow function, you can smoothly transfer files between devices. * Customizable buttons: With the dedicated software "Logi Options+", you can assign frequently used functions to buttons to improve work efficiency. * Angle adjustment function: The mouse tilt can be adjusted up to 20 degrees, allowing you to use it at the optimal wrist angle. This is a high-performance trackball that is active in a wide range of scenes, from professional work to everyday use. Recommended for those who want to reduce wrist strain and improve work efficiency. Shipping: * We will ship via Mercari, with anonymous delivery, tracking, and compensation. * We will carefully pack it with cushioning material (bubble wrap) and ship it in a cardboard box, so please rest assured. * We will complete the shipping procedure within 24 hours of purchase. Other: * Immediate purchase is welcome. * We are very sorry, but please refrain from price negotiations. * Returns and exchanges are not accepted to prevent product substitution. This is a popular product, so please consider it at this opportunity. If you have any questions, please feel free to comment.