1、GREEN BEAM: This right angle level adopts a high visibility green light beam, which can project vertical lines on any surface up to 15 meters, helping you align, correct, and tilt at 90 degrees. 2、ANGLE ADJUSTMENT: Reserve 2 small holes for fine adjustment angle at the inner corner of the light outlet, use a small cross screwdriver to adjust the angle, rotate clockwise when leaning to the left and counterclockwise when leaning to the right. 3、HIGH EFFICIENCY: At the same time, output 2 light lines extending 90 degrees, the protractor scale can be changed according to the angle mark, saving measurement time, efficient and practical. 4、BUILT IN BATTERY: Built in 1100mAh polymer lithium ion battery, equipped with charging cable to ensure long term operation, with LED flashing low voltage indication, clear and intuitive. 5、MULTIPLE USAGES: Can be used for various vertical, alignment, and measurement work, suitable for wall, tile, door, frame, column beam, window, horizontal power socket, pipeline installation, etc. 6、APPLICABLE SCENE: This green light level is designed specifically for woodworking and building construction, and is used for floor laying, wall brick construction, painting hanging, as well as various marking and drawing work.