The new Sonin 3-Way Laser Level is the latest in Sonin innovation. This unique laser level by Sonin simultaneously measures vertical and horizontal levels with three different points. Each Sonin 3-Way Laser Level will direct beams at right angles for perfect placement. Its ergonomic easy-grip handle and hands-free mounting option make this tool versatile and easy to use. This is a great product for inspectors, contractors, do-it-yourselfers, home-owners, and woodworkers. Operates with one 9V battery (not included).