Functionalities: This calculator includes all the basic functions: addition, subtraction, multiplication, division, backspace, total, automatic tax keys, percent key, square root key, backspace key, 3-key memory. The calculator will automatically shut off after being idle for about 9 minutes.Multi-purpose: This calculator's compact size makes it easy to carry and store, suitable for various settings such as home, office, and school. It's perfect for teachers, students, accountants, and bank tellers, helping with personal finance or quick calculations.Package Includes: You will receive 8 packs of calculators, compact and lightweight, making it easy to fit in your bag or drawer. With ample quantity, it meets your various needs.Large Display & Big Buttons: The calculator features a large 12-digit display, making it easy to read numbers even from a distance. The large buttons are ergonomically designed for comfortable touch, helping to prevent hitting the wrong button.Dual Power Calculator: The calculator uses dual power sources, solar light energy and battery. It can operate without batteries in bright conditions. However, if using the calculator in low light, please insert an AA battery (not included) for continuous and accurate use.