Adapt your USB port with this cable so you can power smalldevices and electronics which use a DC barrel jack for a power cable. Type A Male USB plug to 2.5mm (outer), 0.7mm (inner) malecoaxial/ barrel plug with positive center pin Applicable for charging your electric devices via USB portfrom PC and car charger. Provides 5V DC from USB port. USB 2.0 Type A male to DC 2.0/2.5/3.5/5.5mm charging cable. Provides 5V from USB port For small electronics and devices which use a DC jack for a power cable DC plug size: DC 2.0MM*0.6MM /2.5MM*0.7MM /DC 3.5*1.35MM /DC 5.5*2.1M Brand No Brand SKU OT776EL0CSO6KNAFAMZ-217058 Model 31001133