Features: Brand new and high quality 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. 1.2V-12V Wide voltage output,Support boost and bucks,with on off switch,1.2V-5V output 3W,6V-12V output 6W. 50cm cable,this cable can replace 9V AA+AAA Battery,cut the 5.5x2.1mm, jack and connect to your devices. With 3 adapters 2.5x0.7mm,3.5x1.35mm,4.0x1.7mm. 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: Type C input voltage: 5V 2A-3A 5.5x2.1mm Output: 1.3V-12V 0.5A Material: Plastics Cable length: approx. 50cm/19.69inch Package Includes: 1x Type C to 1.2V-12V 5.5x2.1mm Cable with 3 Adapter note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!