The XP1 is an expansion module from Excelsys Technologies, designed to increase the power, expand the I/O, and provide other options available on their power supplies. It is a snap-on module that connects directly to the back of the power supply and provides additional features such as an LCD for monitoring, alarms for warning of low voltages, adjustable output levels, and more. Compatible with all XR series power supplies, the XP1 allows users to customize their setup to maximize the performance and features of their existing setup.