Powerology 60M Distance-Smart Laser is a high accuracy measurement tool suitable for all engineers and architects spending most of their time over construction sites. With the ability to measure distance in Meter, Inch, or Feet unit, this gadget can measure any distance from 0.05M to 60M with about 2mm accuracy, plus calculating the area automatically. It is powered by a 370mAh re-chargeable built-in battery that perfectly functions within 8000 measurements. The battery life is saved as this device is programed to automatically hibernate after 20 seconds and shut down after 150 seconds of inactive time. This device can be a great companion for all the construction workers who need smart and precise measuring tools.