The STANLEY SLM100 Laser Distance Measure is suitable for a wide range of professional measuring applications. It is easy-to-use, thanks to its two-button operation: one to activate the device and take measurements, and a cog button to select different functions. Equipped with a generously-sized screen that displays two rows of measurements. Black characters on a white background make it easy to read measurements, even in bright conditions. The two-point system facilitates measurements from either the top or base of the unit, providing accuracy and flexibility in a multitude of measuring scenarios. Robust, reliable and durable, it has been subjected to a 1M impact drop test to ensure it withstands knocks and bumps, so every professional feels confident using it around the work site. A power saving mode will protect battery life by automatically turning off the laser after 120 seconds and the screen after 180 seconds. Specification: Functions: distance, area, volume, and indirect height measurements via Pythagoras calculationsAccuracy: ± 3mmOperating Range: 30mProtection Rating: IP40Power: 2 x AAA batteries (supplied)