Welcome to our store! This multi-functional calculator not only performs basic arithmetic, but also supports percentages, memory subtraction and addition, memory clearing, and recall. The 12-digit LCD screen provides a clear, large digital display that's easy to read from a distance and simple to use. The desktop calculator features a scientific large-button design with enhanced pressure sensitivity for a comfortable touch. Powered by both solar energy and a built-in battery, this calculator is easy to use and perfect for office or home. Made from safe and eco-friendly wood, the numbers are carved into the wood, ensuring they won't fade with long-term use. Features 29 buttons. Item Type: Solar Powered Calculator Material: Wood Number of Keys: 29 keys Production Process: Carving Working Current: 1.5A Operating Current: 4μA Battery Type: 300mAh Li Ion Battery (Ships with built-in battery) Includes: 1 x Calculator (Ships with built-in battery), 1 x User Manual Customer satisfaction is our top priority. If you encounter any issues with your product upon receipt, such as damage or incorrect quantity, please contact us immediately. We are committed to providing you with the best after-sales service.