Logitech's M305 cordless optical mouse gives you the comfort of a rubber grip body, ridged scroll wheel, and fast, precise tracking. Plug the receiver into your USB port, and forget it! It’s small enough to stay plugged in, even when you put your laptop in its case. With the intelligent battery management, you’ll get several months of use from your batteries, and the battery power indicator warns you when it’s time to change. The Logitech M305 offers you smooth cursor control and the high-speed, low friction scroll wheel flies through your documents, side-to-side or up and down, whatever you need to get the job done fast. You can shift to precise click to click control for more delicate tasks. You’ll be amazed at the difference a quality Logitech mouse will make! Maximum dpi: 1000 dpi Power Supply: 1 x AA Battery Operating System Supported: Windows XP, Windows Vista, Windows 7 Mac OS X 10.4 or later Linux kernel 2.6 or later Features: Ergonomically designed Logitech Advanced 2.4 GHz wireless High-definition optical tracking Plug-and-forget nano-receiver Intelligent battery management Package Contents: Logitech Wireless Mouse M305 Plug-and-Forget Nano-receiver Quick-start guide 1 AA battery Parts: 3 years limited Labor: 3 years limited