Features: brand new and high quality Note: Please check the USB input 5V 2A or higher, make sure your devices need 0.8A or less before you purchase the item, or the adapter may not work for your project. Check the current and voltage of your devices and the adapter with the multimeter if you're not sure if it will work for you. USB Input: 5V 2A; DC Output: 9V; Max current: 0.8A; PLEASE NOTE: The size of the DC Connector is OD: 5.5 mm and ID: 2.1mm. Please check if it fits in the power jack on your devices. Safe & Reliable, with built-in upgraded intelligent IC circuit, our voltage adapter provides your devices perfect protecetion from over-current, over voltage, overload or short circuit. Useful for powering the WiFi router via a power bank or other 5V power source during power outages. Can also be used with other devices that require a 9V power supply. Widely Usage, Super convenient for different kinds of devices such as Fan, Table Lamp, Bluetooth Audio, Wireless Router, Speakers that requires for 9V power. Specifications: Input: 5V 2A Output: 9V 6W, 5.5x2.1mm Cable Length: approx. 1m/3ft Color: Black Type: switch close to USB, switch close to DC (optional) Note: 1.No retail package. 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x USB DC 5V to DC 9V 5.5x2.1mm Step-Up Converter Adapter Cable with ON OFF Switch