The great value of this laser measure is that it gives you an almost instant measurement to any surface you can hit with a beam of light. More precise than using a measuring tape, it is effective over a much longer range*. Unlike a regular tape measure, you don’t have to worry about an end hook pulling free, struggling to make measurements while on a ladder, or guessing at an inside dimension by bending your tape into a corner.
The measure performs addition and subtraction, calculates area and volume, and can even compute the distance between two points by triangulation, useful when you don’t have a direct line of sight. A stake-out function significantly speeds the layout of posts or piers; the measure lets you plot multiple positions at regular intervals, providing an audio signal when you are close to position. In continuous mode, it records the minimum and maximum distances to an opposite surface.
The LCD screen displays metric (to 0.001m) and Imperial measurements (to 0.01' or 1/32"), converts instantly between units, and has a backlight for use in low light conditions. An internal memory keeps track of the last 20 readings.
The measure comes with a nylon belt pouch, and two AA batteries good for approximately 10,000 readings; the laser and device automatically shut off to conserve battery power. Dimensions are 1-3/8" x 2" x 4-3/4". Highly recommended.
* The range of the measure is 40m (roughly 131'). In favorable conditions, the accuracy is ±1.5mm (about 1/16") over the first 10m (32.8'). All laser measures have the potential for a small amount of deviation beyond a certain distance; the possible deviation for this measure is ±0.25mm/m (that’s about 1/100" per 39.5"!).