Great inexpensive way to get any measurement quickly and easely just 1,2,3 turn the unit on press the measure button and record your measurement. Excelent for one person measureing with a compact size that fits easily into a tool belt or pocket. This unit has a 130-Feet measuring range and a plus or minus 1/16th of 1-Inch at 130-Feet and is ideal for material and projest estimates and biding.The kit includes Laser distance measure 2 AA alkaline batteries and instruction manual with warenty card.