This scientific calculator by Casio, model fx-300W, is perfect for office and business use. It has a regular-sized display and key size, as well as features such as LCD display and two-way power (solar and battery). The calculator is handheld and has a durable, protective case for easy transport. The brand is Casio, a well-known and respected name in the calculator industry. This calculator is ideal for scientific calculations, and is a must-have for any office or business setting.