8 digit calculator is perfect for classrooms. Features an extra large display with 14mm digit size. Features basic calculator functions as well as a change sign key, square root key, percent key and 3-key memory. Kit includes 10 calculators in an eco friendly wood caddy. Teachers kit also includes electronic educational materials that you can download and print only what you need for your lesson plans. Protective cover included. 2 year manufacturer warranty. Operates on hybrid power (solar/battery backup).