·Auto Leveling Accuracy: ±10〞 ·Auto Leveling Range: More than 3° each Axis ·Laser Safety standard: Class IIIa ·Self-Leveling time: Less than 30s ·Operating temperature: -10℃ ~ 50℃ ·Dimension: Less than H:220 L:160 W:160 ·Temperature test: Accuracy change: Less than 2" /℃