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