Smart String Tape Measure
Rather than a rigid aluminum tape, Smart String uses, aptly, a string for taking measurements so that even round or curved shapes could be accurately measured. The length of string reads out automatically on the LCD display screen, up to 3 decimal points. There is a button to instantly switch measurements from US standard to metric and a button to save the measurement (up to 3 at a time) and switch to the calculator with access to those saved measurements. And because there weren't enough cool features with just that, there are also a built-in level and flashlight. The string has a maximum length of just 50 inches, so it's better used on smaller-scale projects.
Source: the-gadgeteer.comAdded: 15 September 2011