Enjoy convenience, portability and advanced features with the 2.4GHz Wireless Optical Nano Mouse. Featuring nano technology, this device prevents interference with nearby wireless mouse users. The nano dongle receiver is small enough to keep plugged into a USB port at all times or it can be stored in the bottom of the mouse. Also included is a handy carrying pouch, great for mobile travelers.PLUG AND PLAY: no drivers needed2.4 GHZ WITH 30’ WIRELESS RANGENANO TECHNOLOGY prevents interference with other nearby wireless usersNO PAIRING REQUIRED with RF technologyOPTICAL TRACKING TECHNOLOGY provides accuracy and precision on a variety of surfacesBUILT FOR COMFORT with ergonomically shaped design and soft rubber grip1600/800 DPI RESOLUTION SWITCH BUTTON quickly changes resolution without using mouse management softwareFORWARD/BACK BUTTONS for internet browsing (PC only)BATTERY SAVING ON/OFF BUTTONSUPPORTED OPERATING SYSTEMS: Windows XP, Vista, Windows 7 & 8 or Mac OS X v10.1-10.8