The STANLEY Pocket Laser Distance Measure (TLM40) is ideal for DIY and light building jobs including indoor applications, such as measuring for furniture, plumbing, carpentry, painting and electrical work. The unit has an effective working range of 12m and an accuracy of +/-6mm at 10m for accurate measurements. Easily capture measurements, especially those that would be difficult to capture with a tape measure. It’s compact design fits easily in your pocket and has a One-button operation for point and click measurement function to ease use. This product is Ultra-compact and lightweight for ease of use and convenience and runs on internal Li-ion battery for longer runtime – no need to change batteries (approx. 1000 measurements on a full charge with USB charging available). The black screen with white letters is for better visibility in brighter conditions and has IP54 rated for better protection against dust and water splash.