Plug-top type power supply (wall wart)
Output: 9 volts 300mA regulated - centre negative 2.1mm DC plug.
Input: 230 volts 50Hz with UK 13 amp pin power plug .

Intended for use with:
Roland SH-101
Roland MC-202
Roland TB-303
Roland TR-606
and any other equipment requiring a 9 volt regulated, centre negative power supply.