To power the mouse off, you just fold it flat again.

This creates a comfortable curve around which to cradle your palm and fingers. To power it on, you flex the end nearest you downward, which causes the middle to arch upward hence, the 'arc' in the product's name. When the mouse is turned off, its top is perfectly flat. It takes two AA batteries that fit in a compartment underneath. The device measures 0.6 by 2.3 by 5.1 inches (HWD) and weighs just 2.3 ounces. It works well with both, though with the Mac you can't get the benefits of a few additional settings offered with a downloadable Windows 8.1 app (more on that below). I tested the Arc Touch Mouse with a Microsoft Surface 2 (32GB) ($389.98 at Amazon) (Opens in a new window) and an Apple MacBook Pro (13-inch) ( at Amazon) (Opens in a new window). Since 1982, PCMag has tested and rated thousands of products to help you make better buying decisions. That makes it a much better choice for use with a Surface than the original Microsoft Arc Touch, whose wireless dongle requires a USB port. The second is that the Arc Touch Surface connects via Bluetooth, which frees the tablet's single USB port for some other device. Particularly in its first two iterations, its touchpad is puny, and the capacitive touch sensor that it has in lieu of mouse buttons is not particularly sensitive. First, the Surface is a device in need of a mouse. Two things make the Arc Touch Mouse ($69.99 at Amazon) (Opens in a new window) a good accessory for a Microsoft Surface tablet. I'll let you in on a secret, though: It works just as well with most other Bluetooth-enabled computers. Clad in the same 'dark titanium' (which as far as I can tell is a fancy word for black) as Microsoft's convertible tablets, this stylish, compact, portable mouse is a worthy companion for any Surface tablet. The Microsoft Arc Touch Mouse Surface Edition ($69.99) is sold as an accessory for the company's Surface line.

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Arch touch mouse microsoft