I am selling the Kensington Pro Fit Ergo TB550 Trackball wireless trackball mouse. [Reason for selling/Product condition] I purchased this new and opened the box, but it didn't fit my hand, so I am selling it. It is "almost unused" as I only placed it on my desk and held it for about 5 minutes to check the feel after opening the box. It didn't quite suit me, so I am selling it. There is no wear or dirt from actual use, and it is in a very clean condition, close to new. All accessories (USB receiver, charging cable, instruction manual, etc.) are included. *For the listing, I have cleaned it with an alcohol wipe for safety. [Product Features] It features an ergonomic 45° tilt design, designed to reduce strain on the wrist. Connection method: Bluetooth / 2.4GHz wireless (USB receiver included) compatible Charging method: USB Type-C rechargeable (long-lasting battery) Function: Equipped with a 4D wheel that supports horizontal and vertical scrolling Maintenance: Easy to clean with a ball removal button [Shipping] The product's outer box will be carefully packed with cushioning material (bubble wrap) and shipped via [Rakuraku Mercari Delivery]. Please rest assured that it is an anonymous delivery. If you are looking for a mint condition item that has only been opened, please consider it. Immediate purchase is also welcome. Connection type...Wireless (Bluetooth) Power supply...Rechargeable #Kensington #Kensington #Trackball #TrackballMouse #Mouse #WirelessMouse #TB550 #Ergonomics #CarpalTunnelSyndromePrevention #Telework #RemoteWork