Suitable for game consoles, fan, speakers, routers, can charging through any computer ' s USB port Powering the device through the USB port is ideal for small electronic devices with a 4.0x1.7mm cylindrical socket Pull both ends to change the length, the input voltages is equal to the output voltages, without changing the voltages function A-type male USB plug with 4.0mm (outer diameter) & 1.7mm (inner diameter) male coaxial / cylindrical plug, equipped with a positive center pin Flexible USB to DC4.0x1.7mm cylindrical socket power cord, extendable charging cable, easy to carry, 75cm long, only suitable for 5V electronic devices