Precision, durability, and a convenient design make the DeWalt DW0772 digital laser detector a versatile addition to your took kit. This unit is compatible with all rotary lasers; it doesn't matter if the beam is visible or invisible or if you are working indoors, outdoors, or in bright light. This detector achieves accuracy within 1/25 In. (One millimeter), and it extends the working range of most lasers to an astounding 1000 Ft. for increased versatility. Other convenient features include three volume settings, a completely waterproof housing, and a dual LCD design that lets you read results from both sides of the detector, a feature that's especially useful when you're standing behind a grade rod. The included heavy-duty clamp is built to stand up to the rigors of the job site, and it makes it easy to mount the detector to a rod or other target point.