The power supply for this unit is discontinued, 4TECdirect.com now offers a direct replacement that is a new from manufacturer product with equal specifications. This is not a Crestron product but a 4TECDirect.com product that has been sourced to fit in place of the PW-0550R power supply. This unit replaces power pack for the following and more: MM-DS-12 and MM-DE-12 MediaManifold products, 5 VDC, 5A, Regulated, 120 VAC for U.S. use only.