Features: Multi-functional electronic calculator, not only with 4 standard arithmetic functions, but also supports functions of square root, percent, memory subtraction/ addition, memory clear/ recall, check, etc. Eco-friendly bamboo shell with 29 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 or ON 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: 29 Functions: add, subtract, multiply, divide, backspace, square root, percent, M-(memory subtraction), M+(memory addition), MRC, GT, CE(clear enter), AC(all clear) Item Size: 13.5 * 17.5 * 2cm / 5.3 * 6.9 * 0.8in Item Weight: 285g / 10.1oz Package Size: 18.5 * 14 * 4cm / 7.3 * 5.5 * 1.6in Package Weight: 345g / 12.2oz Package List: 1 * Calculator