Premium Materials Made from high-quality, durable plastic, this mini calculator with a built-in button cell battery boasts lasting performance and a long lifespan. Pocket-Sized Design Its ideal pocket size (6.8*12 cm/2.67"*4.72") allows for one-handed use, and its lightweight design (48.1g/0.10 lb) makes it easy to carry and store. Dual Power Supply This 8-digit calculator with silicone buttons utilizes both solar power and a battery (included). The solar panel fully charges the calculator as long as it's used in a well-lit area. 4 Vibrant Colors Available in blue, pink, purple, and teal to suit your preferences, this mini pocket calculator is perfect for both boys and girls. Multiple Functions This simple calculator features all essential operations, including addition, subtraction, multiplication, division, percentage, square root, memory recall, memory clear, and more, making it suitable for schools, offices, and businesses.