Features:  This professional self-leveling laser level features 2/3/5 lines for a broad array of alignment and precise measurement.  Automatic self leveling mechanism. Audio warning when beyond auto leveling range.  360° rotating base with fine tuning knob, quickly identify the target.  Alternating current or direct current dual use, high efficiency and convenience.  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.  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.     Specifications:  Line: 2 line, 3 line, 5 line 2 Lines Laser Level: 2 Lines 2 Points(1 Vertical, 1 Horizontal, 2 Enhanced Points).  3 Lines Laser Level: 3 Lines 4 Points(2 Vertical, 1 Horizontal, 1 Down Point, 3 Enhanced Points).  5 Lines Laser Level: 5 Lines 6 Points(4 Vertical, 1 Horizontal, 1 Down Point, 5 Enhanced Points).  Color: Green+Black.  Material: Aluminum Alloy Chassis + Engineering Plastics.  Power: AC 110-240V(The US Plug Charger is included) / DC4.5V, AA1.5V x 3(The batteries are not included.).  Size: Approx. 20 x 14cm/7.87 x 5.51".  Laser Wavelength: Vertical and horizontal: 5 x 635mm, down plummet: 1 x 650mm.  Output Power: 1mW (Class II).  Working Range: 25m radius.  Auto-leveling Range: ±3.  Horizontal Accuracy: ± 1mm/5m.  Vertical Accuracy: ± 1mm/5m.  Perpendicular: 90, Accuracy: ± 1mm/4m.  Down Plummet Accuracy: ±1mm/1.5m.  Cross Accuracy: ±1mm/3m.  Working Environment: Indoor/Outdoor.  Operating Temperature: -10℃~40℃.  Operating Time: Approx. 8 Hours.     Package Included:  1 x Lines Laser Level.  1 x Protective Glass.  1 x US Plug Charger.  1 x Strap.  1 x User 's Manual.  1 x Box