Green Beam & Highly Versatile: Green laser is 2 times brighter than red laser with the same light source. it projects bright horizontal & vertical green-beam lines onto flat surfaces and levels in a few seconds with high accuracy. Class II laser product, output < 1mW Self-Leveling & LED Indicator: With the switch to the "unlocked" side, the tool is in self-leveling mode, which means the tool will level itself if it is within ±4° of horizontal and the LED indicator keeps in Green. If the surface exceeds ±4° from horizontal, the laser line will gone and the LED indicator will go red. In this case, adjust the angle of the surface slightly for leveling Upgraded 31-1/2 Inch Tripod: The Tripod can expand to 31-1/2 inch to help you adjust the position of the laser for maximum accuracy.
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