Portable Calculator Calculator Model: CASIO HL - 820LV - BK Twin-powered basic hand-held calculator large, 8-digit LCD display Attached hard cover Made from quality plastic material with a hinged lid for open/close in order to protect the screen and buttons. Product size: 5.9X 10.4 cm. ,and weight 15 grams. Easy-to-read " Large Display" Constants for +,-,x,% Independent memory Profit margin % +-, square root