Features: brand new and high quality USB 5V to 1.5V 3V 4.5V 6V 7.5V 9V 12V 5.5x2.1mm Adjustable Voltage Cable with LED Dislpay suitable for Toy Games LED Lamp and other 1.5V-12V Device 6W output. The module cable is a DC-DC adjustable step up/down power supply module with 2Bit LED digital tube display. Display output voltage in real-time. Rotate potentiometer to adjust output voltage. 1.3V-12V Wide voltage output,Support boost and bucks,with on off switch,1.3V-5V output 3W,6V-12V output 6W. 130cm cable,this cable can replace 9V AA+AAA Battery,cut the 5.5x2.1mm jack and connect to your devices. Wide Application: Mainly Used To Adjust The Brightness Of Single Color LED Lights, Such as 3528, 5050, 5630 Strip LED lights for urban lighting, holiday atmosphere, fan, car lights,car fan and so on. Specifications: USB input voltage: 5V 2A-3A 5.5x2.1mm output: 1.3V-12V 0.5A Material: plastics cable length: 130cm/51.1inch Quantity: 1 Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x USB to 1.3V-12V 5.5x2.1mm cable