Sonin InchMate+

Foot/Inch/Fraction + Triangle Calculator. Instantly converts between feet/inches/fractions, decimal feet and meters - at the touch of a button. Triangle calculation keys solve for rise, run, diagonal, or slope of any right triangle. Patented, user friendly entry system with dedicated fraction keys. Full 6-function calculator including memory, square & square root. Long lasting lithium battery with auto-off feature. Tough protective case with write-on strip. One year limited warranty.