High quality 'wall wart' AC to DC 9V 650mA wall power supply manufactured specifically for NKC Electronics. The output is regulated to 9V and the capable output current is 650mA.
It has universal input voltage (120-240V AC)
These will power most projects that don't require more than 650mA of current. Center-positive 5.5x2.1mm barrel connector.
This is the ideal power supply for the Arduino boards (UNO, MEGA 2560, Duemilanove, MEGA, Freeduino).