Features: Portable electronic calculator with daily add, subtract, multiply, divide and backspace functions, suitable for home, office, school, retail store use. Eco-friendly bamboo shell with 18 keys, exquisite design, and the carved numbers won't disappear because of long time usage. Large LCD display, 12 digits calculation power, clear and accurate, ideal for daily use. Using both solar panel and button battery, double intelligent power supply: generally using solar power, when solar power is used up, using button battery instead. Pressing AC key to turn on the power, it will automatically turn off if no operation in 12 minutes to enter power saving mode. Specifications: Material: Bamboo Digits: 12 Keys: 18 Functions: add, subtract, multiply, divide, backspace Item Size: 16 * 9.5 * 2cm / 6.3 * 3.7 * 0.8in Item Weight: 188g / 6.6oz Package Size: 18 * 10 * 3.5cm / 7.1 * 3.9 * 1.4in Package Weight: 230g / 8.1oz Package List: 1 * Calculator