The Sharp EL-W516TBSL Advanced Scientific Calculator is a handheld device with a regular key size and a 4-line display. It is powered by batteries and features Solar power capability for convenience. This model is specifically designed for scientific calculations, making it ideal for students, professionals, and anyone in need of precise mathematical computations. With its advanced features and reliable brand, the Sharp EL-W516TBSL is a top choice for those looking for a reliable and efficient calculator for office or personal use.