Leica RVL100 Receiver LINO Laser Receiver for Use with Line Lasers, Red/Black Allows for detection of red pulsed laser beams in difficult light conditions for distances up to 200ft Large reception window of 1.65 inches and optical and acoustic signals help to locate the laser plane Ergonomic design with display on both the front and back of receiver along with magnets to directly attach onto metal surfaces such as steel studs