This Casio SL-450L calculator comes with a sturdy hard case to protect it during transport or storage. With its solar power source, you can use it anywhere without needing to worry about replacing batteries. The regular-sized keys make it easy to use, and its basic functions make it perfect for everyday business or personal use. The calculator is made by the trusted brand Casio and its model number is SL-450L. This item is great for those in need of a reliable handheld calculator for office, school or home use.