Features:  - This professional self-leveling laser level features 12 line for alignment and precise measurement.  - Automatic self leveling mechanism. Sound warning when beyond auto leveling range.  - The button is waterproof, wear-resisting and feel exquisite, easy to operate.  - The thickened metal base provides stable support and it is shockproof, shatter-proof.  - Plumb-point function, accurate positioning of the machine.  - Easy to carry with the plastic case and carrying strap, providing quick and convenient mobility and storage.  - Wide applications for auxiliary tiles fixing, wall decoration, floor tiles fixing, stair handrails and more.  -Shipped with 2 lithium-ion batteries.     Specifications:  - Laser Color: Green.  - Material: Aluminum Alloy Chassis + Engineering Plastics.  - 3D Laser Leveling: 8 Vertical Line, 4 Horizontal Line.  - Laser Wavelength: 655nm.  - Line Output Power: <5mw.  - Laser Class: Class IIIB.  - Damping Type: Magnetic.  - Leveling duration: ≤4s.  - Laser Level Line Width: 1.5mm, 5mm.  - Pricision: ±1mm 10M.  - Accuracy: 90° ± 30.  - Leveling Range: ±3°.  - Rotation Degree: 360°.  - Working Distance: Up to 10M indoor; up to 30M outdoor.  - Power Supply: 1 x 3000mAh Rechargeable Li Battery(Built-in)(Comes with a spare battery).  - Working time: 4 Hrs.  - Working Temperature: 14 to 122 (Fahrenheit).  - Storage Temperature: -4 to 140 (Fahrenheit).     Package Included:  1 x Green Light Line Laser Level.  1 x Protective Glass.  1 x Transfer Power Adapter.  2 x Li Battery.  1 x English User Manual.   1 x Protective Bag.  1 X 1M Tripod(Optional).  1 X T-shaped Upper Wall Shelf(Optional).  1 X Base(Optional)