Optional Linear Power Supply upgrade for improved sound quality in matching chassis. Backward compatible with the ZENmini MkII. Specifications POWER Mains Supply 230V AC / 115V AC – Internal Linear Power Supply DC Output DC 16V, 3A maximum Connector 2.5 x 5.5mm barrel plug Dimensions 215mm x 245mm x 75mm (W x D x H) Weight 4 Kg In the box Innuos ZENmini LPSU DC Connection cable with barrel plug Mains Cable Getting Started leaflet