SMAKN&reg; DC 5V 3A 15W Switching Power Supply Adapter 100-240 Ac Compatible with most devices that use a 5V 3A or lower amperage 2.5mm x 5.5mm (Inner diameter x Outer diameter) with inside positive polarity Input: 100-240V~0.6A, 50/60Hz / Output: 5V 3000mA 10W Max