Featuring the latest multipronged measurements technology, an improvement from all previous versions. It combines a tape measure, a triple-positioned leveling bubble, and a laser level into one tool. Designed for any situation where a straight line or accurate measurements are needed. 8-foot measurement tape includes of metric and imperial precision linear measures.
Laser ranging error, which is given as "+/- 2mm at 10m and 25m".
Power by: 3x AG 13 button battery（included）Total：6 button battery Size: 18.5 (L) x 6.2(W) x 2.8 (H) cm Color: Black Net weight: 228g
Laser radiation, avoid direct eye exposure! Please press the key button when you pull out the measuring tape, it would make the measuring tape better and easier using. Please loosen the key button to lock the reel when the measuring tape have been drawn out the length you wanted.