Dual Power Supply Design- Simply insert one battery into the spring-loaded slot to start the calculator. To facilitate battery replacement (not included), we designed the battery slots into two. The calculator can run on batteries and solar energy.Large 12-digit Display- Basic office calculator with large 12-digit display and 15-degree angle. The huge LCD screen displays large numbers clearly, making them easy to read from a distance, making reading and calculations effortless. Dimensions: Length: 15.2 cm/5.98 inches, Width: 14.8 cm/5.83 inches (approx.)Retro Typewriter Style- This desktop calculator uses typewriter style clean lines and retro round keys. The thick tube size is suitable for desktop use as well as handheld use. Large round keycaps fit your hands easily and prevent fatigue.Calculator Function-Comfortable operation, independent memory. Add, subtract, multiply, divide, backspace, total, CE, %, M+/M-/MRC, on/AC button and auto-off. The calculator will turn itself off after approximately 6 minutes of inactivity.Use in Multiple Occasions-This desktop calculator is designed for multiple occasions: business, office, home, basic budget, school, corner store, etc. This candy-colored calculator is so cute and makes the best gift for Christmas, New Year, Thanksgiving, birthdays and many other holidays.