pecifications: Laser lines: 16 line Laser Color: Green Laser Class:Class 2 Horizontal/Vertical Accuracy: ±2mm/10m Automatic leveling range: ±4° Rotation Degree: 360° Working distance: 25m Slash function: Yes Protection level: IP54 Dustproof & Waterproof Operating temperature: -10℃~50℃ Battery capacity: 4000mAh/1Pcs Working environment: Indoor/Outdoor Power: 2 x 4000mAh Rechargeable Li Battery /Direct charging(3.7-4.2V) Application: Auxiliary tiles fixing, wall decoration, floor tiles fixing, stair handrails, furred ceiling, floor tile, plastering. Features: ● 4D 16 line irradiation, 360° without dead angle. ● Indoor and outdoor general Universal, High brightness green, indoor and outdoor clearly, far projection distance, high laser height, clear lines. ● Touch screen design, touch screen operation, more convenient. Precise measurement and more convenient to use. ● Crashworthy and anti knock, crashworthy and anti knock. ● International standard IP54 waterproof and dust-proof, multiple protection, Longer life in harsh environment. ● Large-capacity lithium battery, durable ● ±4°Automatic self leveling function. Sound warning when beyond auto leveling range. >>Self-leveling function: After turning on the laser power, switch the power and press the operation key to select the laser beam mode. When the inclination angle of the instrument exceeds 3º, the laser ray will flash quickly and alarm so that whether the locating place of the instrument is even or not can be detected. >>Manual mode (Slope mode): On state, long press the "M" key for about 3 seconds and "M" key flashes, the laser line is inclined, no flickering and no alarm, you can continue to operate to select the laser beam and can be operated at the angle you choose. Package Included (16 lines): 1 x Laser Level 1 x Remote Control 1 x Metal Base 1 x Lifting Base Stand 1 x Upper wall Bracket 1 x Laser Adapter 1/2 x Lithium Battery 1 x Charger(EU/US plug) 1 x Oxford Bag 1 x User Manual