Description Self-Leveling Line Laser (Green Laser Beams) | Total Tools CanadaGreen laser beamsWorking Range: 0~20 m1 Horizontal Line4 Vertical LinesLevelling accuracy: ±1.5mm at 5 mLine accuracy ±1.5mm at 5 mLevelling time<3s Self-levelling angle ?4° Laser Type 520nm Laser Class ?,<1mW Packed by color boxWeight: 31.46 lbsDimensions: 24.8 × 17.13 × 9.45 inPCS/SBOX: 1PCS/CTN: 8