Size: Compact design, 2' wide and 6' long, for easy handling and storage Accuracy: High accuracy level of 3/8' per 50' for precise leveling and guidance Vials: Three vials for accurate leveling, read plumb, level, and cross-check Laser: Magnetic leveling laser with a range of up to 100 ft, projects a beam for leveling Rotating head: Swiveling head to project laser dot, horizontal or vertical lines Durability: Durable molded housing, impact-resistant body for harsh work sites Power: Works with 2 AA alkaline batteries, providing up to 70 hours of battery life