description”:”The standard calculator features 12 digits display. It equipped with four standard arithmetic functions, change sign (+/-)key, GT key, square root key, 3 memory keys, mark-up/mark-down key(MU), and percent key can meet your normal calculating requirement. Features: Clear 12 digits display, great for daily calculations. Dual power supply, solar and 1 * AAA back-up battery(not included). Wide keyboard and soft plastic keys, easy for operation. GT function, 3 memory keys, square root key, change sign key(+/-), mark-up/mark-down key(MU) and percent key, completely meet your normal calculating requirement. Ergonomically tilted design, comfortable for input and reading data. Perfect for school, office work and home use. Specifications: Material: ABS Power Supply: Solar & 1 * AAA Battery (not included)   Digit: 12 Memory Key: 3 Mark-up/Mark-down: Yes Percent Key (%): Yes Square Root: Yes Change Sign (+/-): Yes Grand Total(GT): Yes Backspace Key: Yes Item Size: 16 * 12cm / 6.3 * 4.7in; 17 * 13.5cm / 6.7 * 5.3in; 20 * 15.5cm / 7.9 * 6.1in (Optional) Item Weight: 145g / 5.1oz; 174g/ 6.1oz; 241g/ 8.5oz Package List: 1 * Calculator 1 * User Manual(Chinese/ English) Note: The battery is not included.