USB 2.0 male to 3.5mm 5V DC Power Cable Barrel Connector Jack Plug - WDLLC Exclusive brand: WDLLC (Product certified by WarehouseDeals LLC) ::: 2 Pack :::USB Type A male to 3.5x1.35mm barrel connector / Length: 0.7 meter = 28" Inch Power devices from a USB port / Provides 5V 2.0A DC from USB Can be used with 5V USB adapter, external battery, powerbank or computer USB port Compatible with any mini R/C helicopter or R/C similar with connector outer diameter 3.5mm