Desk calculators with check & correct functionGeneral Data: 12-Digits EXTRA BIG LC-Display Two Way Power Dimensions (H x W x L): 28,6 x 126,5 x 148 mm 300 Steps Check Plastic Keys Key Rollover Weight: ca. 140 g Battery: 1x LR44Functions: Review & Auto Review Recheck with Sound Assist Correct Key Tax Calculation 3 Key Memory Key for changing Plus/Minus Sign Local Digit Separator Formats Double Zero Key Percentage Calculation Back Space Key Mark Up Square Root GT Memory