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) Product use: Pendant, door and window installation, tile, chandelier hanging, ceiling, etc. Tips: The product may be updated continuously. The actual product may have slight differences or color variations. Appearance and color may change. Please consider this before placing your order if you have specific requirements for color or appearance. Notes: Product does not include batteries (2 x AAA batteries) Material: ABS Color: A-orange Package Contents: 1 x Level meter Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual item. Measurement error allowance is +/- 1-3 cm.