Kensington SlimBlade Media Mouse, Wireless Mouse with Media Controller (Dark Wine) K72282US Unique Scroll Ball provides easy and intuitive 360-degree scrolling Multifunction navigation pad allows you to control your digital media from anywhere in the room Navigation pad on the media controller includes: volume control, track control, play and pause Battery indicator light is green then changes to red as the battery level is getting low Mouse goes into sleep mode when your notebook does to prevent power drain