Microsoft 2.4GHz Wireless BlueTrack Technology Laser Explorer Mouse with 30-Foot Range and Easy Battery Recharging Base (5AA-00001).
From the ManufacturerOverview:Works on Virtually Any Surface.The Microsoft® Explorer Mouse, with revolutionary Microsoft BlueTrack™ Technology, works more places than ever before, including on granite countertops, living room or airport carpets—even on a wood table or rough, unfinished park bench.  Features:   Easy RechargingThe battery status indicator tells you when a quick recharge is needed. The compact, stable recharging base is easy to use. Reliable Wireless on the GoMicrosoft 2.4 GHz wireless and the snap-in mini-transceiver deliver a reliable connection with up to a 30-foot range. Sophisticated Design and ComfortThe glowing blue light effects and comfortable curved surfaces set your mouse apart. Additional Features:Go Anywhere -Microsoft BlueTrack Technology™ combines the power of optical with the precision of laser for remarkable tracking on more surfaces.*5-Button Mouse- Get quick access to the media, programs, and files you use most often with customizable buttons.4-Way Scrolling -Scroll side to side as well as up and down.What is BlueTrack?Microsoft’s proprietary BlueTrack™ Technology works on more surfaces than both optical and laser mice.** It uses high-angle imaging optics to generate an accurate picture of the surface.   Now track more accurately on:  Granite Carpet Wood  System RequirementsWindows Vista®/Windows XP100 MBMac OS X v10.2.x-10.5x30 MBUSB PortCD drive1 NiMH rechargeable battery (included) Also Available:Microsoft® Explorer Mini MouseFor Notebooks *BlueTrack Technology does not work on clear glass or mirrored surfaces.**Compared to leading laser and optical mice commercially available spring 2008.