The QS12 Quick Start Kit makes it easy to connect your computer to Legacy Pro series relay controllers. The QS12 includes the RSIO adapter, 120VAC to 12V DC Power Supply rated at 1.25A or more. This is a computer grade switching power supply, rated for use with NCD controllers. Also included is a 6′ (~2M) Serial Extension Cable for interface between your PC and the RSIO interface.