Easy to Use Design – With a large screen, this calculator is made for convenient and comfortable everyday use. The tough tilting display even increases visibility from all angles. Large applied button – Comfortable and durable buttons make it easy to use for people of all ages, including children. Sturdy construction – With a hard plastic body, the Office Calculator is built with everyday use in mind. Its 6x4 size ensures comfort in use. Standard functions – With 6 functions including addition, subtraction, fractions, percentages and tax conversions, this calculator can perform efficiently for everyone. Dual power source – Using battery and solar power, it supports constant use throughout the day every day. Extra large LCD display 12-digit LCD display is perfect for stationary use either at home or in the office. Enhanced large display: Specially modulated pigment for the display that significantly improves the clarity of the display. Dual power Powered by dual power supplies – solar power and battery backup. The solar design allows the calculator to work in the daytime or even in low light without a battery. Ergonomic design Large and clear display makes it easier to see. 30° tilt design is more comfortable for people to see. PC push buttons with ergonomic design, wide keyboard with large buttons feels super comfortable and increased touch sensitivity. Multiple use buttons simplify financial calculations to save time and increase efficiency.