The PK5501 is a high-quality, slim-profile keypad. It has a clean, unobtrusive look that homeowners welcome and installers will appreciate for their easy programming and installation. The keypad feature an input/output terminal that can be programmed to operate as a zone input, programmable output or as a low-temperature sensor. The keypad also features adjustable, backlit keys that address low-light situations and programmable keys for simple activation of system functions.