The Bosch GLL 2 Self-Leveling Cross-Line Laser is a compact leveling and alignment solution. It features the Smart Pendulum System, which self-levels and indicates out-of-level position. The system offers a switch slider to lock for secure transport. Easy-to-use one-button operation allows the user to choose among cross-line, horizontal or vertical modes, depending on the application, and it provides an accuracy of ±3/16 In. at 30 Ft. The unit includes a flexible mounting device that can clamp to practically any interior surface for maximum versatility. The manual mode allows the user to lock the cross-line, so the operator can lock the line and set the level at any desired angle.