S04DG 4 x 360 Green Laser Level Specifications: * Laser Class: Class 2 (IEC/EN60825-1/2014), * Laser Wavelength: 520nm * Screen type: LCD screen with backlight * Horizontal/Vertical Accuracy: +/- 1/9 inch at 33Ft * Leveling/Compensation Range: +/-4° * Working Distance (Line): 20M(60-100 LUX), 40M with Huepar Receiver LR-5RG/LR-6RG * Operating Time: 6 hours continual use with all laser beams on * Power Source: 2600mAh Li-ion battery&Dry battery * IP Rating: IP54 dust-proof, waterproof and shockproof, reliable and tough * Operation Temperature Range: 14& 8457; ~ 122& 8457; (-10& 8451;~ 50& 8451;) * Storage Temperature Range: -4& 8457; ~ 158& 8457; (-20& 8451;~ 70& 8451;) * Mount Size: 1/4"-20 WARNING: & 9679; Do not point the laser beam directly into the eyes.