The Microsoft Arc Touch Mouse

The Microsoft Arc Touch Mouse has a unique design. The mouse comes out of the box flat and you give the mouse its arc by bending it. The specs as follows:

• Flexible Design
• Curve for comfort, flatten to pack. A perfect fit for your hand—and your mobile lifestyle.
• Power On and Off
• Curve to turn on. Flatten to turn off. No button to switch. A green light flashes to show the battery is working, and then turns off to save battery life.
• Touch to Scroll
• Click. Tap. Flick. Control.
• BlueTrack Technology™
• Works on difficult surfaces1—rough glossy, or soft.
• 2.4 GHz—30-Foot Wireless Range
• The 2.4 GHz wireless USB Nano Transceiver connects wirelessly right out of the box with virtually no interference and has up to a 30-foot wireless range.
• Snap-in Transceiver
• Nano Transceiver snaps into the bottom of the mouse.
• Comfort for Either Hand
• Use your mouse with your left or right hand.
• Device Stage
• Quickly and easily access common tasks, including product information, registration, settings.
• Up to 6 Months of Battery Life

[Source Microsoft]