MX ERGO Logitech M-R0065 wireless trackball. I am selling it because I don't use it much anymore since my workplace changed. I will disinfect it with alcohol before shipping, so please rest assured. Why you should buy this: Minimizes wrist strain Hinged design allows for 0-20° angle adjustment. Excellent for preventing carpal tunnel syndrome even during long hours of work. Space-saving & High precision Since it's a trackball, no space is needed to move the mouse. The DPI switch button makes detailed design work a breeze. Dual connectivity Supports both Bluetooth & Unifying receiver. You can switch between up to 2 devices with one touch, perfect for those who use both Mac/Windows! USB-B rechargeable battery Can be used for up to 4 months on a full charge. No more stress from running out of battery. Customizable Button assignments & gesture registration with Logicool Options+. Dramatically improves work efficiency. *Varies depending on the usage environment. Product condition Operation confirmed Accessories: Body only *Alcohol cleaned, no smokers, and stored in a pet-free environment. Shipping: Mercari delivery (anonymous delivery) / Free shipping Will be carefully packed in a cardboard box and shipped within 24 hours. Recommended for: Those who are suffering from shoulder and wrist pain while working remotely. Those who frequently use Illustrator/Photoshop/CAD, etc., and require precise operation. Those who want to operate multiple devices such as dual PC + iPad with one device. Those who want to comfortably operate a mouse even on a small desk. Before purchasing: Please refrain from purchasing if you are sensitive to used items. Feel free to ask any questions in the comments. Instant purchase is OK!