Features: USB C 5V to 2V 2.5V 3V 4.5V 6V 7.5V 9V 12V 5.5x2.1mm Adjustable Voltages Cable with LED Dislpay suitable for Toy Games LED Lamps and other 2V-12V Device 6W output. This Type C to 5521 voltages regulating cable for anyone who needs to charge or power their devices quickly and efficiently. The 5521 cable is a adjustable step up/down power supply with 2Bit LED tube display. Display output voltages. Rotate potentiometer to adjust output voltages. 2V-12V Wide voltages output,Support boost,with on off switches,2V-12V output 6W. 50cm cable,this cable can replace 9V AA+AAA Battery,cut the 5.5x2.1mm 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 lighting, holiday atmosphere, fan, car lights,car fan and so on. Specifications: USB C input voltages: 5V 2A-3A 5.5x2.1mm output: 2V-12V 0.5A(inside positive,outside negative) Material: plastics cable length: 50cm Note: 1,Please allow 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 C to 5.5x2.1mm cable