Featuring thier new Bluetrack technology, the latest Explorer is a wireless productivity mouse from Microsoft. This new technological advancement allows the mouse to track more easily on surfaces that laser and optical mice struggle with (but it still wont work on mirrored or transparent surfaces of course) - which is all a non-issue for those that use a mousepad of any kind. The explorer also features a convenient charger, and while solidly constructed, the mouse is far from perfectly designed due to poorly placed back/forward buttons and the low placement of the sensor on the body of the mouse - making twisting motions almost completely ignored. The steep price of $80 also doesn't help, putting this fairly mainstream offering in a league with the top-of-the-line mice from Microsoft's competitors.