HDE USB 2.0 to 5.5 mm Plug Barrel Connector Jack 5 Volt DC Power Supply Socket Cable Power devices from a USB port For small electronics and devices which use a 5.5mm barrel jack for a power cable Provides 5V DC from USB; Cable length: 1m / 3ft Type A Male USB plug to 5.5mm(outer), 2.1mm (inner) male coaxial/barrel plug Fits many standard laptops; be sure to check your charging port size to be sure it will fit