5V USB Power Cable to 9V Male Adapter Jack 5.5×2.1mm DC-DC 5V to 9V Converter Step Up

From the shop's description

5V DC to 9V DC USB power data cable adapter charger plug with LED can be accessed by charging computers, cars, switches, and other equipment Universal replacement USB to DC Transmitter / Power Cable for USB lights, fans, mini speakers, USB hubs, transmitters, and more. Plug & Play: This 5V to 9V DC converter is really handy when travelling or outdoors, Just power it with a 5V 2A power bank and you can start running your 9V devices. Widely Usage: Super convenient for different kinds of devices such as fans, Table Lamp, Bluetooth Audio, Wireless Router, and Speakers that require 9V power. USB Input: 5V A male; DC Output: 9.0V; Max current: 0.8A; PLEASE NOTE: The size of the DC Connector is OD: 5.5 mm and ID: 2.5 mm(2.1mm). Safe & Reliable: With a built-in upgraded intelligent IC circuit, our voltage adapter provides your device’s perfect protection from over-current, over-voltage, overload, or short circuit. Longer Transfer Distance: 1M power cord and no loss current, makes long distance transfer free. Specifications: Input voltage: DC 5V Output voltage: DC9V Standard USB connection to 2.1mm X 5.5mm diameter rounded lead. Color: Black Length: 1M Features: 1. Transparent USB plug with power indicator light 2. Can be accessed by charging computers, cars, switches, and other equipment 3. Reliable and fast data transmission 4. Easy to use and carry.