The LX7 has some really LONG battery life up its sleeve. It takes two AA batteries and Logitech claims that you won’t need to change them for 8 months! It accomplishes this by a few different methods. Most optical mice have a LED light that seems like it’s on 24/7. The LX7 also has a LED but it is very dim and only activates when there is movement, when there is no movement it shuts the mouse off. Logitech calls this the ‘invisible optical’. In addition to that, you can also manually shut the mouse down via the on/off switch on the bottom.

As for the buttons, it has two regular buttons for left and right clicks. In addition it has a forward and back button to control your browser and a wheel that scrolls web pages up/down/left/right and also zooms on click - pretty sweet function which is also found in most Logitech mice these days. Also on the top of the mouse is a battery indicator that will only light if the batteries need schanging soon.

The optical sensor for the LX7 is rated at 1200dpi which is pretty good, and like I said, this isn’t a gaming mouse. If you want a gaming mouse go for something like the G5 which has 2000dpi sensitivity. I didn’t notice any problems with sensitivity booting around my desktop or drawing in Photoshop so no problems in that department.

The mouse uses Logitech’s 27 MHz wireless mini USB receiver to communicate with your PC. Both the receiver and the mouse are paired at the factory so they work right out of the box.

Logitech LX7 Cordless Optical Mouse Features include high-definition optical technology - Up to 1100 dpi for ultra-responsive cursor control, and battery-saving Invisible Light optical technology that uses less power than ordinary optical mice.  

Features

• Wireless mini-receiver: Compact size eliminates clutter and works with notebooks or desktops. Installs effortlessly.
• Comfortable rubber grip: Soft-touch rubber sides and contoured shape make the Logitech LX7 Cordless Optical Mouse naturally comfortable.
• Universal Forward/Back buttons: Convenient Forward/Back buttons speed web browsing and paging through large documents.
• Side-to-side scrolling plus zoom: Tilt Wheel Plus Zoom is perfect for viewing digital photos and spreadsheets. Instantly zoom in and out, plus scroll horizontally or vertically.
• High-definition optical technology: Up to 1100 dpi for ultra-responsive cursor control. Battery-saving Invisible Light optical technology uses less power than ordinary optical mice.
• Smart power management: Automatic standby mode extends battery life up to 8 months; use on/off button to go even longer. Indicator light alerts you when batteries are low.

System Requirements

• Windows 98/2000/Me/XP/VISTA
•  MAc OS 10.2.8 or higher
• USB port
• Internet connection to download free software here.

This product is in "like new" condition, and has been factory recertified by a technician, so you know you're getting a good product! They are packaged in a sealed clear OEM style plastic bag.  Software/Documentation not included, but available as a free download by clicking here.