Royal XE6 8 Digit Tiltable Display Calculator with Solar and Battery Power Tiltable Display. Solar and Battery Power. Auto Shut Off. Full Function Memory. Grand Total, Percent & Square Root Keys. Ergonomic Compact Design. Soft-Touch Rubber Keypad Royal Machines XE6 8 Digit Tiltable Display Calculator with Solar and Battery Power Auto Shut Off & Full Function Memory Grand Total, Percent, & Square Root Keys