The TP02GAS1 Delta Keypad is designed to work with Delta Controls building automation systems and is used as an input device to control and monitor various building systems such as HVAC, lighting, and security. It features a two-line LCD and twelve buttons for input, including function keys for quick access to commonly used commands. In addition to its basic functions, the TP02GAS1 Delta Keypad also has advanced features such as password-protected access and programmable function keys.