Features: Portable electronic calculator with daily addition, subtraction, multiplication, division and backspace functions, suitable for home, office, school, retail store use. Environmentally friendly bamboo shell, 18 keys, beautiful design, engraved numbers will not disappear due to long-term use. Large LCD display, 12-bit calculation ability, clear and accurate, very suitable for daily use. Use solar panels and button batteries at the same time, dual intelligent power supply: usually use solar power, when the solar energy runs out, switch to button batteries. Press the AC key to turn on the power, if there is no operation within 12 minutes, it will automatically turn off to enter power saving mode. Specifications: Material: Bamboo Numbers: 12 Keys: 18 Functions: Addition, Subtraction, Multiplication, Division, Backspace Item Size: 16 * 9.5 * 2cm / 6.3 * 3.7 * 0.8 inches Item Weight: 188g / 6.6oz Package Size: 18 * 10 * 3.5cm / 7.1 * 3.9 * 1.4 inches Package Weight: 230g / 8.1oz Package List: 1 * Calculator