What is a stand alone keypad?

A stand-alone keypad is a self-contained input device used for entering numerical or alphanumeric data without needing a connected computer or system. It typically features a keypad layout and may include a display for showing user input or operational status. These keypads are often utilized in access control systems, point-of-sale terminals, or automated machines, providing a simple and efficient means for user interaction. They can operate on batteries or be powered by an external source.