The Casio RT-7000 desktop calculator boasts a large tilting screen with 12-digit display, and works with two-way power (battery and solar energy). There are four currency conversion memories, and several other functions to help you with tax, time and date calculations. And thats not all! The Casio RT-7000 also has a double zero key, rounding selection and a rapid correction button. Product details: - Metal cover - +/- key - Independent memory - Percentage calculation - 3-digit comma markers - Square root - Dimensions (H x L x W): 1.97 x 10.85 x 18 cm -Weight: 250 g - Battery: 1 x CR2016