The Casio FX-300ES Plus 2nd Edition Black Handheld Solar Power Calculator is a reliable and efficient scientific calculator perfect for office and business use. With its solar power capabilities, this calculator is environmentally friendly and convenient to use. The regular key size and display make it easy to input and view calculations, while its handheld size makes it portable and easy to carry around. The Casio FX-300ES Plus is a trusted model known for its accuracy and functionality, making it a valuable tool for any professional setting.