OverviewLI1 is an angle meter for home or office use, not a special level meter on the market. The laser line casting does not have the automatic leveling function. The casting line has an angle error that has been publicly explained. Please make a strict judgment before buying.     Product Parameters   Brand Name : DUKA Ll1 laser angle projector Product Size : 120*20*35mm Product net weight : 95g Laser wavelength : 660nm Laser class : Class ll Protection level : IP54 Indoor distance : ≤10m Accuracy : 0.5° Battery : 730mAh Rechargeable Lithium Battery Operating mode : Absolute angle Relative angle   Package : LI-1 Dual Laser Meter Holder