Introducing the Casio FX-300 ES PLUS Classical Music Calculator, a powerful tool for any musician or music enthusiast. This calculator boasts a variety of features, including the ability to perform complex calculations, solve equations, and display your work in stunning detail. With its solar and battery power source, this handheld calcululator is perfect for on-the-go use or for extended periods of time. The regular key size and display size make it easy to use and navigate. The calculator is manufactured by Casio, a trusted brand in the industry. This model, FX-300ESPLUS, is perfect for anyone in need of a reliable and efficient calculator for their musical pursuits.