SW‑311G Green Beam Leveling Tool Automatic Laser Line Level for Architecture Building Item Type: Green Beam Level Material: ABS Model: SW-311G Uses: Used in construction, decoration, home improvement, home furnishing, furniture, etc. Battery: 1.5V 2 x AA Battery (Battery Not Included) Laser Class: Class 2 (IEC/EN60825-1/2014) Laser Wavelength: 510-530nm Leveling Accuracy: ±3mm/10m Vertical And Horizontal Accuracy: ±3mm/10m Leveling/Compensation Range: 4°±1° Working Distance (Laser Line): 20m / 65.6ft Working Time: 4 Hours Waterproof/Dustproof Rating: IP54 Working Temperature Range: -10℃-50℃ Storage Temperature Range: -20℃-70℃ Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.