Description Multi-function laser levels: guideline, laser beam, ruler and tape measure (8 feet) 4 in 1, designed for every situation where a straight line or measurements are needed.3 layers : the laser level with a level, welding and a 45 bubble to determine the horizontal and vertical level. For more accurate results.Suitable for hanging pictures along a stairwell, hanging mirrors, installing curtain rods and other household items; the laser part can be used separately and alone; only for indoor use (ideal for fathers gift).Easy to use: it is equipped with a selection button on the front. It controls the switching of vertical laser line, horizontal laser line and cross laser line mode, is suitable for different modes of use, more accurate and more stable. Functionality Projects a vertical and horizontal beam of laser light Built-in measuring tape of 8 feet, with imperial and metric scale. Accuracy to 1/32 34; and 1mm. Class IIIA laser product, output power less than 3.5mW Bi-level bubbles The laser light has an on/off switch. Note: Laser ranging error, which is given as 34;+/- 2mm at 10m and 25m 34;. If the laser is the vertical level or the horizontal level, you do not need to adjust the beam. Batteries not included Features Black color Product size : 20 (L) x 2.5 (W) x 6 (H) cm Package size: 22.5 * 8 * 4 cm Net weight : 190g Warning 1. laser radiation, avoid direct eye exposure