Overview The Casio SL-310SV is a portable solar-powered calculator designed for quick and reliable calculations in a variety of settings. It features a clear 10-digit LCD display that remains easy to read from multiple angles, making it suitable for office work, classrooms, outdoor kiosks, and trade shows. Its dual power system uses solar energy with a battery backup to ensure continuous operation even in low-light conditions. The calculator’s slim and lightweight design allows it to fit comfortably in a pocket or notebook, while a protective wallet-style case safeguards the keys and screen during transport. A metal faceplate adds durability, helping the device withstand everyday bumps and scrapes. Built-in functions for profit-margin percentage and square root simplify common calculations, saving time for vendors, students, and travelers alike. Key features 10-digit LCD display that provides clear and readable numbers from various angles Dual power system combining solar energy with battery backup for uninterrupted use Slim and lightweight design that fits easily into pockets or notebooks Protective wallet-style case included to shield the calculator during transport Metal faceplate enhances durability against daily wear and tear Dedicated keys for profit-margin percentage and square root to speed up calculations Automatic power-off after ten minutes of inactivity to conserve energy Key specs Display: 10-digit LCD Power: Solar cell with battery backup Design: Slim and lightweight with metal faceplate Auto power-off: Activates after 10 minutes of inactivity Included accessory: Wallet-style protective case Ideal uses and environments This calculator works well in environments where portability and reliability are essential. It suits office workers who need a dependable tool for everyday calculations, students requiring quick access to basic math functions, and vendors or travelers who benefit from profit-margin and square root keys. Its solar power capability makes it especially useful in outdoor or low-light settings where battery replacement might be inconvenient.