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, level for hanging pictures. 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 4mm. BACKUP BATTERY - ships with 3 x AG13[LR44] 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 gadgets for Man and building some Thanksgiving decorations) Specifications: Product Size: 7.28 (L) x 2.5(W) x 1.1 (H) Inch Packaging Size: 8.27*3.15*1.57 Inch Color : Black Net Weight: 6.49oz Net Weight: 184g Package weight: 9.2oz Packaging content: 1 x Metal Ruler 1 x Level Laser 1 x User Guide Back up battery:3 x AG13(LR44) Button-Cells