Features: 1. 4D 16/12 line irradiation, 360° without dead angle. 2. Indoor and outdoor general Universal, High brightness green, indoor and outdoor clearly, far projection distance, high laser height, clear lines. 3. Precise measurement and more convenient to use. 4. 8/12/16 line can be Optional, suitable for different occasions to meet different engineering needs. 5. Crashworthy and anti knock, 4D soft rubber clad, crashworthy and anti knock. 6. International standard IP54 waterproof and dust-proof, multiple protection, Longer life in harsh environment. 7. Built-in 2*18650 battery, single 2000MAH, 4000mAh large capacity battery with longer endurance life, long service life. 8. ±3°Automatic self leveling function. Sound warning when beyond auto leveling range. Specifications: Material: Aluminum Alloy Chassis Engineering Plastics. Laser lines: 16/12 line. Laser Color: Green. Laser Level Color: Blue/Green. Wall attachment distance: 7mm. Horizontal/Vertical Accuracy: ±0.2mm/ 1m. Wavelength green light：532. Automatic leveling range：±3°. Rotation Degree: 360°. Slash function: Yes. Protection level: IP54 Dustproof; Waterproof. Operating temperature: -20℃-50℃. Battery capacity: 2*2000mAh. Working environment: Indoor/Outdoor. Working time: 12~16h. Power: Built-in 2 x 2000mAh Rechargeable Li Battery /Direct charging(4.2V ). Size: 14x8x15cm/5.5x3.1x5.9in. Application: Auxiliary tiles fixing, wall decoration, floor tiles fixing, stair handrails, furred ceiling, floor tile, plastering. Package Included: 1 x Laser Level. 1 x Remote Control. 1 x Lift Holder. 1 x Wall Bracket. 1 x Iron Sheets. 1 x Bracket connector. 2 x Lithium Battery. 1 x USB Charger. 1 x Anti-fall box. 1 x User Manual