I inherited some DJ and sound equipment from a family friend who passed away and I have no use for this excellent lighting unit that appears to function properly. See video. I turned it on. It runs through It’s adjustment mode at startup and then responds to loud sounds or music. I haven’t looked up the manual to figure out how to use the different modes and things, but it seems like these have a lot of functionality and are very popular. Free domestic shipping. We pack well and ship fast. Check our outstanding seller rating and buy with confidence!