Equipped with magnetic damping system for quick self-leveling. *If the unit exceed the self-leveling range, the laser line will be shut off with warning signal. *The unit will emit one horizontal,3 vertical line with plumb dot, the 3 vertical line will be acrossed On the ceiling at 90. *With horizontal rotating mechanism and fine adjustment knob for covenlence working. *With Indoors/Outdoors switch functlon, laser dalector can be used for outdoors operation. *Remote control can be optioned to control most function on the unit. *High accuracy, short self-leveling line. *Standard outfit: Main unit, laser glasses, magnetic target,. Optional accessories LVH800 laser Detector with clamp, RL800 remote control. ITEMS PERFORMANCE SPECIFICATIONS Accuracy 1mm/5m Self leveling range +-3 Working range 10m no detector,25 with detector Laser source Sanyo 7mw, modulate impulse source Wave length 635nm Width of laser 1.5mm/5m Output power Source of output-dot 5.2mw Laser safety class Class II Detecti