TY30 Laser module·ªsingle glass lens Exterior sizes ·ª73 x 73 x 36 mm Laser diode·ª635nm Accuracy·ªfa1 mm / 5 m Line width·ªfn1.8mm/5m Angle of projection·ª·+ 140fp Leveling range·ª fa3fp Weight·ª about 0.225 kg Power supply·ª 2 aa batteries ( dc 3v) Operating temperature·ª 0f¦ ~ 40f¦ Operating time·ª18hours .