Features: 1. The laser level can measure whether the plane is uneven or hanging pictures, and can make three kinds of lines: straight line, cross line and vertical line. 2. There are horizontal beads on the laser level, which can measure whether the horizontal plane is horizontal. 3. The laserlevel is equipped with a circle ruler.(2.5m, metric/imperial scale). 4. There are scales(15cm,6 inches) on the edge of the laser level. 5. Use this Multipurpose Laser Level for hanging pictures, installing shelving, laying flooring, hanging wallpaper and more. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: black model (ABS plastic + aluminum alloy); yellow model (ABS plastic) Color: black/yellow (refers to the appearance color of the product, both laser levels print infrared rays) Laser wavelength: 650nm-680nm Black power supply: AG13 battery (1.5V button battery) with 3 batteries. Yellow power supply: use two AA batteries (included) Accuracy: 1mm includes: 1 x 4 in 1 Infrared Laser Level Tape