When a product’s role is not needed, the futility of the product becomes apparent. TWO-FACE resolves to make use of the “idle moments” of a product. Usage time for a calculator is usually short, and when the user is not working, a calculator is left on the desk like an object without function. This project turns a calculator into a functioning digital clock when the calculator function is not needed. Simply fold the display panel and flip the TWO-FACE calculator to prop it up – the user now has a desktop digital clock. To operate, use the number buttons that are already part of the calculator design to set the time and date.