High-precision measurements with full coverage Multi-line laser: With 16 laser lines, it can form a 4D omni-directional measurement system, including two 360 horizontal planes and two 360 vertical planes, which can fully cover the floor, wall and ceiling of a room, providing accurate benchmarks for various construction and measurement. Superior accuracy: Advanced laser technology delivers accuracy of 1mm/7m, ensuring accurate and reliable measurements in a variety of environments. Intelligent auto-levelling, fast and convenient Auto levelling: Equipped with auto levelling function, the levelling range is 3, after placing the level, it can be quickly and automatically calibrated to the level state, which greatly saves operation time and energy. Quick response: levelling time is only 6s, which can be put into use quickly and improve working efficiency. High-quality performance, adapt to a variety of environments Clear laser: emits 515nm green laser with stable wavelength and clear light, which is clearly visible under various light conditions indoors and outdoors, and the brightness adjustment function can make the laser line clearly discernible even under strong light conditions. Wide working temperature range: it can work normally in the temperature range of - 10 to + 45, adapting to the construction needs of different seasons and environments.