The Rocktron DC OnTap Universal Stomp Box Power Supply powers up to 20 stomp boxes at the same time. Includes cables allowing connection to almost all stomp boxes and effect pedals available (old and new!). The DC OnTap by Rocktron features a switching power supply that operates automatically at 110V or 220V power allowing global usage. The main features of the Rocktron DC OnTap include: 9V DC, 1670mA total power Powers up to 20 stomp boxes at the same time Includes cables: Daisy chain cable with standard 2.1mm jacks, Extender cable for larger pedals – 2.1mm jack, Reverse polarity cable for older pedals, Reverse polarity cable for use with 2.5mm jack, Battery plug cable – connects to battery clip, Cable to connect to pedals with 2.5mm jack