This sixteen-foot metal tape measure will never be far from your hammer and drill. Simply measure a length of wood as you normally would, to determine its exact length. If working with a sighted friend, the measurement is printed on the tape like normal. Unlike normal tapes, however, you can just press the button on the side of the case to instantly hear the precise measurement spoken aloud in a clear, male voice. It speaks in feet, inches, meters, centimeters or millimeters - and converts at the touch of a button. By pressing a button you can include the width of the case in the total as well. Measurements can be added to memory to enable total measurements of almost 3,200 feet (an entire kilometer) and the memory is even retained when the unit is switched off. Takes 1 AA battery - which is included.
(From the Math and Measuring shelf.)