IOGEAR 2.4G Hz Multimedia Mini Keyboard with Trackball, Scroll Wheel and Backlight LED, GKM571R (Black) Range Up to 33 Feet Away from Your Home Theater PC/Computer or Laptop Light Sensor Activated by Opening and Closing the Protective Keyboard Cover Backlight LED Can Be Turned On/Off for Battery Saving Built-in Left and Right Mouse Buttons with Built-in Scroll Wheel Built-in Optical Trackball with 400, 800, and 1200 DPI Selections Multimedia Shortcut Keys Allows You to Access E-mail Access, Volume Control, Play/Pause, My Computer, Media Player and Launching Your Web Browser 3-Year Warranty