Features:  High brightness Green, indoor and outdoor clearly.  Indoor and outdoor use,far projection distance, high laser height, clear lines,visible in the sun.  Precise measurement and more convenient to use.  4/8/12 line can be adjustable, suitable for different occasions to meet different engineering needs.  3D soft rubber clad, crashworthy and anti knock.  Waterproof and dust-proof, multiple protection, Longer life in harsh environment.  Large capacity battery with longer endurance life.  3D 12 line irradiation, 360° without dead angle.  ±4°Automatic self leveling function. Sound warning when beyond auto leveling range.  360° self leveling function.  360° rotating base with fine tuning knob,quickly identify the target.Thickened metal base provides stable support and it is shockproof, shatter-proof.     Specification:  Line Color: Green.  Laser lines: 12 Line.  Power: 2x 3.7V 1500mAh Lithium Battery (Built-in).  Input Voltage: 100-240V 50/60Hz.  Material: Plastic+Aluminium Alloy.  Wavelength Green Light: 653nm.  Working accuracy: ±1mm/5m.  Automatic leveling range: ±4°.  Operating temperature: -10°C ~ +40°C.  Storage temperature: -10°C ~ +40°C.  Working Time: 3-9h.  Moisture: 90%.  Base Size: approx.10cm x 9.5cm.  Size: approx.12.6cm x 10cm x 9cm.  Product Weight: 1435g.     Package included:  1 x Main Machine.  1 x Instrument Soft Package.  1 x Base.  1 x Power Adapter