What is the power source of the Casio HS-4G calculator?

The Casio HS-4G calculator is solar powered and features a Super Solar design, which means it does not require batteries.

What features does the Casio HS-4G Basic Handheld Calculator have?

The Casio HS-4G Basic Handheld Calculator features an 8-digit display with 16-digit approximations, independent memory, a profit margin function, percentage calculations, a square root key, and a protective hard case that covers the screen and solar panel.