Techtest Right Angle 90 Degree Square Laser Level Tool Measurement Vertical Horizontal Line Leveling Aligner Level pro Leveling Instrument Leveler Led Measuring Tool Style name:Laser Level 90 Degree   Square Laser: Generate 2 line at Right Angle (90 Degree) Ideal for floors, tiles, paneling, wall fixtures, wallpapering, stencilling, wainscoting, finish carpentry and more. Simple one button operation powers two perpendicular laser lines (90 degrees) on and off. Dimensions (L x W x H):150 x 73 x 50mm Wavelength: 630-670nm Power output: <5mw Accuracy: ±1mm/3m Available distance: 16m Battery type: 3 AAA 1.5V batteries ( Not included ) Operation temperature: -10~50°C