WOVTE USB 2.0 A to 5.5 mm x 2.1 mm 5 Volt DC Barrel Male Connector Jack Power Charger Cable Pack of 2 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: 1.5m / 5ft Type A Male USB plug to 5.5mm(outer), 2.1mm (inner) male coaxial/barrel plug with positive center pin.