For single 8 inch , single 6x9 single 6.5 and smaller builds
Kit is 5v you need a voltage converter with less then 5a output below is a good brand simple two wire input from battery and two wires to controller
https://amzn.to/4e0Qd7D
get the 5a or less version
kit includes
1x strand of LED lights single end
1x controller
1x dc plug...