Only 7 months old. My husband decided to get a new apple trackpad instead. The Ultimate in Freedom, Comfort and Productivity. The Expert Mouse Wireless Trackball gives you the freedom to be hyper-productive without being limited by a USB cable. The trackball can be paired through Bluetooth 3.0/5/0 LE to save a valuable USB port, or connected via USB nano receiver. KensingtonWorks software offers incredible customization, and optical tracking technology offers smooth, precise cursor control. Plus, our patented Scroll Ring lets you quickly scan up and down web pages or long documents. Add it all up and you get exceptional comfort and ease-of-use from the brand that has set the industry standard in trackballs for more than 20 years. Wireless connection via Bluetooth LE or USB nano receiver KensingtonWorks software lets you customize all 4 buttons, adjust cursor speed. ChromeOS user can get HID functions for a trackball but will not be able to customize their device through KensingtonWorks. DiamondEye optical tracking technology for premium cursor control and accuracy Patented Scroll Ring lets you scan up and down pages with ease Large ball is designed as a perfect sphere to provide exceptional precision Detachable wrist rest supports hand and wrist for ergonomic comfort Ambidextrous design works equally well for both right-handed and left-handed users Auto-sleep helps conserve AA battery life Kensington worked directly with Microsoft to provide professional-level solutions that look as good as they function, so you can work like a pro.