The Stanley Pocket Laser Distance Measure has a one button operation for point and click measurement function. It is ultra-compact and lightweight for ease of use and convenience. It runs on internal LI-ION battery for longer runtime so no need to change batteries (approx. 1000 measurements on a full charge), USB charging is available. The measure has a black screen with white letters for better visibility in brighter conditions, It is IP54 rated for better protection against dust and water splash.