CrazyDeal AC 100-240V DC 12V 1A 5.5 x 2.1MM Wall Charger Power Supply Adapter US genial comfortable This item is One DC 12V 1A Universal external switching power adapter Solve the problem of insufficient power supply mobile hard disk Wide input range, high precision voltage Plug: US Connector: 5.5 x 2.1mm Output voltage: DC 12V 1A Input voltage: 100 ~ 240V (AC)(50-60HZ) Output current: Maximum 1A Power supply polarity: Inside positive outside negative, inside x(+) outside i(-)