Product features: 1. Projects a straight laser line on any surface, not just a point. Set the straight line to any angle. 2. Suitable for carpentry, stair risers, shelving, molding, tiling, or any other job that requires precise alignment. 3. Double bubble level for accurate horizontal or vertical alignment and retractable push bar to hold the channel in place while working. 4. On/off switch, very easy to use. Correct use: Hold the laser marking instrument against the wall. The effective distance is about 5 meters and cannot be used on the ground. The effective distance on the ground is about 1 meter. The longer the distance, the less visible the line will be. Parameters: Product name: Level meter Power supply: 2 x AAA batteries (not included) Intended use: Pendant, door and window installation, tiling, chandelier hanging, ceiling, etc. Tips: The product may be updated periodically. The actual product may have slight differences in color or appearance. Please note that colors and design may vary slightly. Consider this before placing your order if you have specific requirements for color or appearance. Notes: Batteries not included (2 x AAA batteries required) Material: ABS Color: C-red Package Contents: 1 x Level meter Only the above package content is included; other items are not part of the package. Note: Light reflection and differences in display screens may cause the color of the item in the image to vary slightly from the actual product. Measurement error allowance is +/- 1-3 cm.