2.4GHZ 4CH Wireless Video Audio Receiver CCTV Camera Security System

I should of looked at the photo, I can’t put a review up because there is no power source. I’ve tried to use other power adapters from my other devices but none work- I would of paid a few bucks more for a way to power it up. Maybe it woks - maybe it doesn’t- but one thing is for certain- it does not come with a way to plug it in.