Cross Line Laser Accuracy +/-1/8 in @ 30 ft Battery Type Alkaline Features Full-Time Pulse Mode Allows use with Detector Maintains Full Brightness for Visibility Locking Pendulum to Helps Prevent Damage to Internal Components Projects Down Beam with Raised Clearance Provides Dot Visibility and Alignment for Wall Track Layout Includes Kit Box Number of Beams 2 Number of Planes 0 Number of Dots 0 Number of Lines 2 Working Range with Detector - Maximum 165 ft