Zircon DM S50L-FFP Tapeless Ultrasonic Measuring System with Laser Targeting and Easy to Open Packaging Measure for carpet, paint, and more, now quicker and easier than ever before Fast, tapeless measurements up to 50-Feet (15 m) using ultrasonic technology and a laser targeting system for increased accuracy Measures interior room for length, width, area, and even volume using easy-to-follow, on-screen graphics and prompts "Double Segment" program allows you to stop and start a measurements in varying increments and then calculates the math for you Switch from standard (feet/inches) to metric units with the push of a button Power: Class IIIa (&lt;5 mW peak power) Measure for carpet, paint and more, now quicker and easier than ever before Fast, tapeless measurements up to 50-Feet (15 m) using ultrasonic technology and a laser targeting system for increased accuracy Measures interior room for length, width, area and even volume using easy-to-follow, on-screen graphics and prompts "Double Segment" program allows you to stop and start a measurements in varying increments and then calculates the math for you Switch from standard (feet/Inch) to metric units with the push of a button