I am selling this item as I purchased it on Amazon this year and have hardly used it. Logitech M705m Wireless Mouse, Wireless Unifying 7 Buttons, High-Speed Scrolling, Battery Life Up to 36 Months, Wireless Mouse, Charcoal, Windows, Mac, Chrome, Domestic Genuine Product Product Specifications Manufacturer: ‎Logicool (Logitech) Series: ‎M705m Product Size: ‎10.9 x 7.1 x 0.1 cm; 162 g Batteries: ‎2 AA Batteries Item model number: ‎M705m Color: ‎Charcoal Product Dimensions: Width x Height ‎10.9 x 7.1 x 0.1 cm Power Source: ‎Battery Powered Hardware Platform: ‎Laptop OS: ‎Mac OS X 10.1 Puma, Mac OS X 10.11 El Capitan, Mac OS X 10.4 Tiger, Mac OS X 10.2 Jaguar, Mac OS X 10.3 Panther Battery Type: ‎AA Item Weight: ‎162 g