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.   Specifications:   Brand Name : DUKA Ll1 laser angle meter（Xiaomi ecological chain product）   Dimensions : 120*20*35mm   Net weight : 95g   Laser wavelength : 660nm   Laser class : Class ll   Protection level : IP54   Indoor distance : ≤10m   Accuracy : 0.5°   Angle Error: 0.5°   Battery : 730mAh Rechargeable Lithium Battery   Operating mode : Absolute angle Relative angleLI1    Package : LI-1 Dual Laser Meter + Holder