eFreesia&reg; AC Adapter Power Supply 5V 5A (Tip Size: 2.5mm x 5.5mm with positive center) 4A 3A 2.5A 2A 1A Compatible with most devices that use a 5V 5A 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 5000mA 25W Max 12 Months eFreesia Warranty