AC/DC regulated switching power supplies for running stepper motors and other equipment. This 48 volt 72W (watt) desktop-type power supply is encapsulated and includes an AC power cord. Higher 48 volt provides 20% higher speed but with half the amperage compared to 24 volts. Not recommended for novices or inexperienced electronics. Requires special voltage upgrade in Au controllercoder, not for use with standard controllers. Use one power supply per motor, recommended for any 57mm size motor and smaller. Compatible anywhere in the world, universal 110-230VAC, 50/60 hz, UL/CSA FCC approved. Email us for professional engineering advice.