USB to DC Power Cable Cord, DC 5V to DC 9V USB Voltage Step Up Converter Cable, Power Supply Adapter Cable with DC Jack 5.5 x 2.1mm, Widely Used for Small Electronics and Devices which Use a 5.5mm Barrel Jack for a Power Cable, like Fan, Led Light, Wireless Router, Speakers and More Devices.

Product Parameters:
USB Input: 5V 2A
DC Output: 9±0.5V, Max Current: 1A
DC Plugs: 5.5 x 2.1mm, inner diameter 2.1mm, outer diameter 5.5mm
Tips: negative center pin
Support : Only for 5V devices, please check carefully the input specification of your device before purchase.
Cable length: 4.9ft
Package included: 1 Pack DC 5V to 9V USB 2.0 A Male to DC 5.5x2.1mm Power Supply Voltage Step Up Converter Cable

Note:
In the following cases, please choose other product.
1. Power > 9W.
2. Amp > 1A.
3. Polarity or port size mismatch.
4. Product connector not USB port.
5. Our charging cable can not charge laptops.
6. We will provides 12 month and 100% satisfying after-sales service, any questions please no hesitate to contact us

How to check whether the DC plug is matched with the electrical DC input socket? As long as the voltage is the same, when the output voltage of the boosting wire is matched with the input voltage of the electrics, it works. And all electrics devices with current less than 1A also can be used. If you're not sure the voltage and size of DC plug of your electronic, Please seek help from the electrical manufacturer.