Nobody else in the industry offers the ease and efficiency of a wireless scaler. Simply roll the scaler wheel along your plans and the measurements are instantly transmitted into your database, your spreadsheet, or you estimating software (not included). With the Scale-Link, you can eliminate the hassle that comes with large, complex plans and blueprints, because Scale-Link reaches just about anywhere you can. The Scale-Link comes with a charging cradle (USB powered), a carry case, rechargeable batteries, and a user manual. Simply load the included Ready Connect software, put the batteries into the scaler, open your software, and you are ready to work.