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1.The length of the laser digital level is 600mm with two vials one horizontal and one vertical the bubble accuracy is 0.029"=0.50mm/m basis on the planer 0.043"=0.75mm/m top of the position. 2.Laser wavelengthz:635nm-650nm for you to select.The laser is with dot,line,and cross . 3.Laser power:we can supply 1mw-5mw for you to select 4.Laser point horizontal accuracy:+-3mm/10m. 5.The range of the digital display equipment accuracy :0degree -360degree(4*90degree) 6.The accuracy of angle-measuring:0degree and 90degree+-0.1degree 0.1degree-89degree+-0.2degree 7.Ringing on the special angle:0 degree,45degree ,90degree 8.Battery voltage:3V 9.Power switch /LCD/ON/OFF 10.Packing is double layer.