Black Desktop Calculator - Stay on top of your calculations with this desktop calculator, featuring a large display screen and dual power sources (solar and battery) for ultimate convenience. Dual Power Supply - The simple calculator is powered by both solar energy and batteries, and can be used in areas with ample light without batteries. Due to changes in lighting in daily life, it is recommended to use batteries for power supply at the same time. This calculator requires an AA BATTERY, please note that the battery is not included in the packaging. Big Buttons - Add a touch of personality to your workspace with this cute black calculator, complete with big buttons for easy use and a slim design that won't take up too much room on your desk. 12 Digit Display Screen -12 digit numerical calculation, sufficient for daily use, and the large LCD display screen makes it easier for you to read. Get back to basics with this simple calculator, perfect for everyday use at home, school, or the office. Cute Black Calculator - Whether you're a student or professional, it's reliable and easy to use, with a big display screen and solar power option for ultimate convenience. Plus, the cute black design makes it stand out from other calculators on the market.