These MKS Granville Phillips AC adapter power supplies are used to power a single MKS Granville Phillips 475 controller Gauge. They have a 10 foot cable length and operate on 220-240 VAC North American Plug. They supply 24 VDC to the GP 475 Convectron Controller Gauge. This is a converter North American AC to DC power supply only, MKS Granville Phillips 475 Controller sold separately.