72 Built-in scales for more versatility, 39 imperial (feet-Inch) and 33 metric * 6 Custom Scales, 3 each for imperial and metric units, lets you "roll" or define any scale from plans that have been reduced, enlarged, faxed or are otherwise out of scale * Calculate area, volume, height, length, width for imperial and metric units * Manual Count while rolling for studs, piers, outlets or other items. Subtract function to remove the last distance measured * Includes 2 long-life 3-volt batteries, hard cover protective case, English User Guide, multi-language available on corporate website