DEWALT DG5142 Pro Contractor's Business Portfolio with Flex-Light, Built-In Calculator, Full Zipper Enclosure USE INDOOR AND OUT: Built in Flex-Light allows you to use this portfolio indoors and out, in all lighting conditions. DURABLE: Ballistic poly material with Sure- Grip spine provides strength and durability BUILT IN CALCULATOR: Solar and battery power for quick, accurate calculations FULL ZIPPER CLOSURE: Helps keep notes and documents secure while sleeves and pockets hold business cards, credit cards, pens, pencils and markers FITS WRITING PAD: Spring clip that can hold writing pad up 8-1/2-Inch by 11-Inch Ballistic poly material with Sure- Grip spine provides strength and durability Built in calculator with solar and battery power for quick, accurate calculations Full zipper closure helps keep notes and documents secure while sleeves and pockets hold business cards, credit cards, pens, pencils and markers Comes with 2 CR20136 batteries Spring clip that can hold writing pad up 8-1/2-Inch by 11-Inch