The most advanced laser technology for distance measurement. Simple one-button operation to instantly measure distance between two objects. Measures up to 50 m (165 ft) with accuracy of 2 mm (0.08 in). Bright laser for easy targeting even at longer distances. Quick calculation of area (square feet/meters) and volume. Easy addition and subtraction function. Pythagoras function indirectly measures height via two other measurements. Stores up to five measurement results. Battery life of 3000 measurements with automatic shut-off feature. Two-line display with display hold (until next button is pressed). Carrying pouch secures to your tool belt. Powered by two AAA batteries.