Detailed Product Description Features:Five laser dots intersect 90°.Laser line shows blink while it is out of the leveling range.Aseismatic ability is stronger, which can be used to the construction.Specifications:H accuracy ≤ 4mm /10mV accuracy ≤ 4mm /10mUp beam accuracy ≤ 4mm /10mDown beam accuracy ≤ 6mm /10m90°including angle accuracy ≤4.5mm/10m Leveling range 4°±1°Operation distance ≤30mDiode ...