A large 8 digit, plastic keys, percent key , +/- sign change, MU key, square root, dual power, silver casing and comes with wallet. Functions & features include: 8 Digit Pocket Calculator, Dual Powered, Non-stick plastic keys, Mark-up, Square Root, Change sign key, Metal case, Wallet. Casio Pocket Calculator HS-8VA-WK-UP. Display: 8-Digits BIG LC-Display. Battery: 1 x LR54. Functions: Square Root, Percentage Calculation, Independent Memory, Key For Changing Plus/Minus Sign, Mark Up. Dimensions: 69 x 57 x 102 mm (h x w x d). Colour: Silver. A dual-powered (solar/battery) 8-digit calculator, ideally suited to educational applications as the low-cost makes it possible to allocate one per student.