FEATURES: Self-leveling cross line laser is accurate to ?0.3 mm/m in leveling applications, Self-leveling up to 4 degrees surface angle with automatic out of level indication; marks a leveled line in seconds, 2 button operation and low battery indication for ease of use, Built-in magnetic pivot bracket mounts easily on metal surfaces, Over-molded housing and thick glass protects the tool and helps maintain calibration under job site conditions, Includes 3 x AA batteries for 40 plus hours runtime, Kit box protects the unit and helps maintain calibration when stored in gang box, Works with DE0892 detector up to the distance of 50 meters. SPECIFICATIONS: Laser class: 2; <1mW, Levelling Accuracy: +/-0.3 mm/m, Number of beams: 2, Direction of beams: vertical/level, Indoor Visibility Range: 10 m, Self-Levelling Range: +/-4 ?, Power Supply: 4.5V ? 3x AA, Tripod connection: 1.4?, Width: 61 mm, Length: 112 mm, Height: 113 mm