Extends laser functionality up-to 165 feet indoors and outdoors for the fastest point-to-point alignmentLEDs on front and back provide high visibility feedback, improving the set-up processRare earth magnets located on two sides of the detector allow it to easily attach to metal surfaces, ideal for ceiling grid installationThe included material clamp is perfect for setting elevationFeatures adjustable audio and over 40 hours of runtimeFine and coarse accuracy settingsIncludes: (1) Laser line detector, (1) Material clamp, (2) AA batteries