The STANLEY 30' Pocket Laser Distance Measurer allows you to capture measurements on the go when completing any home or business project. The pocket size is easy to carry and the 30’ range (10m) is great for most interior measurements. This units features accuracy of 1/4" at 30 ft. Powered by a lithium-Ion battery that allows for on the go USB charging. Common uses include estimations and taking linear measurements. Laser Class 2 / Output less than or equal to 1mW, 630-690 nm.