Name: Lenovo M120 Pro wireless mouse Ergonomics: Yes Support System: for Win XP/7/8/10/Mac OS Roller: red engineering rubber roller Resolution: 1000DPI Color: black Interface: Built-in USB receiver Number of buttons: 3 Size: 118*61*38mm Mouse interface: USB2.0 Working method: optical mouse Applicable models: desktop/laptop 4.Note: Battery is not included.(2*AAA battery needed) 5.Package List: 1*Wireless Mouse 1*USB receiver