Square Laser:Generate 2 line at Right Angle (90 Degree).Simple one button operation powers two perpendicular laser lines (90 degrees) on and off.Ideal for floors、 tiles、 paneling、 wall fixtures、 wallpapering、 stencilling、 wainscoting、 finish carpentry and more.Features:Brand new and high quality.Laser Level Square an easy to use layout tool.Projects horizontal and vertical laser "chalk lines" on surfaces.Dual diodes for making 90 degrees laser beam on any surfaces.Two bubble vials.Two suction cups allow the laser level square to be mounted onto the surfaces.Alignment guide for 90-degree layout-calculate and turning angles in 5-degree increments.Layout and partition installation.Specification: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.Laser Safty Warning:This item is not a toy! not for age under 14 years old.Don not aim laser beam into eyes.Laser light can be harmful if used improperly.Keep this item from water、 dust、 and avoid direct sunlight .Note:Due to lighting effects、 monitor's brightness 、 contrast settings etc、 there could be some slight differences in the color tone of the pictures and the actual item.Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid.Package Included:1pc x Square LaserNO Retail Box. Packed Safely in Bubble Bag.