Spectra Precision Lasers / Trimble QM55 Quick Measure Distance Meter Rugged, designed to withstand drops up to 5 feet (1.5 m) and backed by a 3 Year Warranty (2 Years No Cost) Measuring range up to 165 feet (50 m) and measure in difficult to reach areas Reduce errors with an accuracy of 1/16 inch (1.5 mm) over the entire range Fast measurement response and simple area addition and subtraction functions help reduce calculation errors Large backlit LCD is easy to see in all conditions and the long battery life - 5000 measurements Class 2 Laser	and &lt;1mW (less than 1 Milliwatts)