ITEM NAME:Multi Voltage Power Adapter 3v 4.5v 5v 6v 7.5v 9v 12v DC 2.1A Power Suppl OCN.Extra USB output: 5V 2.1A. The standard six adapter specifications are: 2.5 0.7mm, 3.0 1.1 mm, 3.5 1.35, 3.5 1.5 mm, 5.0 2.1 mm,5.5 2.5 mm. Standard DC head size DC cable length: 1.2m. US Plug Universal power adapter 30W.