SW-333G Laser Line Level Automatic Leveling Green Beam Level Measure Tool Item Type: Line Level Material: ABS Color: As shown in the picture Model: SW-333G Application: Used in construction, decoration, home improvement, home furnishing, furniture, etc. Battery: Li-ion 3.7V 5200mAh(Included) Basic Parameters: 1. Laser Class: Class 2 (IEC/EN60825-1/2014) 2. Laser Wavelength: 510-530 nm 3. Leveling Accuracy: ±3mm/10m 4. Vertical and Horizontal Accuracy: ±3mm/10m 5. Leveling/Compensation Range: 4°±1° 6. Working Distance (laser Line): 30 meters (100 lx ambient light) 7. Working Time: About 4 hours (all lasers are turned on) 8. Waterproof/Dustproof Grade: IP54 9. Working Temperature Range: -10℃-50℃ 10. Storage temperature range: -20℃-70℃ 11. Working Distance with Receiver: >50m How e Press and hold the power/lock switch on the top of the instrument to turn on the instrument and project the laser.