Metravi 50 meter Laser Distance Meter is used to determine the distance of an object or span without contact by way of a laser. The 50 meter Laser Distance Meter operates using visible or invisible laser radiation and is rated as eye-safe in compliance with laser class 1 or 2. The Laser Distance Meter consists of face components such as an LCD, a power button, operating buttons, batteries and a laser source. The Distance Meter measures the time between those two events and converts this to a distance. The 50-meter laser distance meter sends a pulse of laser light to the target and measures the time it takes for the reflection to return. Product Attributes: Brand: Metravi Country of Origin: India Model: LDM 100 Product: Laser Distance Meter Range: 50 meter Item Weight G: 135 Dimension Mm : 115 x 48 x 28 Measures in: m, in, ft, Addition / Subtraction Name of the Product: Laser Distance meter