DSC PowerSeries PK5500 Alarm Keypad. PowerSeries high-quality, slim-profile keypads achieve a clean, unobtrusive look that homeowners welcome and installers will appreciate for their easy programming and installation. The keypads feature an input/output terminal that can be programmed to operate as a zone input, programmable output or as a low temperature sensor. The keypads also include adjustable backlit keys that address low-light situations and five programmable keys for simple one button activation of system functions. PK5500/RFK5500 64-zone full-message keypads support eight languages, global partition status and full, 32-character programmable phrases. What you need to know about the return. Please keep all the contents of the box in the original packaging. This is not applicable to those who received a damaged package. To ensure that your order is delivered on time please make sure your address and your full name are correct. Box at this time.