FeatureConnector: USB / DC 2.5mm x 5.5mm;2.5mm inside is "+", 5.5mm outside is "-", Input Voltage: DC 5V; The Maximum Passing Current: 2A; Cable length: approx.3.28ft /1 meter (incl. plugs), Cable outer diameter: 3.5mm/0.14 inches. Descriptions:Buying the cable with the wrong plug size is a common problem. Please check if it fits in the power jack on your devices. Note: Not all electronic equipment utilizes a 2.5mm x 5.5mm size plug, especially small digital devices. The most reliable way to judge if this cable is for your power adapter is by measuring the inner diameter and outer diameter of the plug of the power adapter. Application:Provides 5V DC from USB, Power devices from a USB to 5.5 x 2.5mm port For small electronics and appliances which use a 5.5 x 2.5mm barrel jack for a power cable. Widely used for routers, USB lights, fans, clocks, 5V mini speakers, USB hubs, etc.
