Logitech LX7 USB Cordless Optical 5-Button Scroll Mouse Logitech LX7 USB Cordless Optical 5-Button Scroll Mouse General Features: Cordless Wireless USB mini-receiver Soft-touch rubber sides and contoured shape High definition optical technology Up to 1100 dpi for ultra-responsive cursor control Universal Forward/Back buttons Side-to-side scrollingplus zoom Battery-savingInvisible Light optical technology