The Fluke 421D Laser Distance Meter includes audible feedback for taking room angle and incremental measurements, a ±45° tilt sensor for taking indirect measurements in hard-to-reach areas, and enhanced Pythagoras calculation for indirectly determining distance. The device automatically stores the last 20 measurements for quick recall of previous measurements. It measures distances up to 330 ft with one push of a button. The meter is claimed to be more accurate and dependable than devices using ultrasonic technology. It is IP54 rated for resistance to water spray and dust.