Qooltek Multipurpose Laser Level laser measure Line 8ft+ Measure Tape Ruler Adjusted Standard and Metric Rulers 3-PRONGED APPROACH - combines a fine-tuned tape measure, a triple-positioned leveling bubble and a NEW laser level to provide maximum results.Note: Laser Ranging Error,that is given as "+/-2mm at 10m and 25m";If the laser is the Vertical Level or the Horizontal Level, you shouldn't adjust the Beam.) WORKS FOR INDOOR - designed for any situation where a straight line or accurate measurements are needed, such as measuring locations on a wall, space between hangers, level the nails. Regardless of the situation, it's completely plug & play. Note: Fades in sunlight or outdoor use. 8-FOOT Measuring Tape - comes loaded with an 8-foot measure that includes imperial and metric linear measures, with graduations down to 1/32" and 1mm. BACKUP BATTERY - ships with 3 x AG 13 button-cells battery, just to make sure you keep going with maximum convenience. IDEAL For The Job That Requires A Straight Line Or Accurate Measurement.(Ideal for building some Thanksgiving decorations and Christmas decorations)