The light can just be plugged in any power unit and it turns itself on when it gets dark and off with the morning light. Most clients use a standard 3 prong connecting cord (already attached to the unit) connected to a standard outdoor 3 prong electric cord that plugs into a standard household electric outlet. The chord that is already attached to the unit is also rated for outdoor/indoor use.
For more info check out our Ultimate Guide to Laser Xmas Lights – http://laserchristmaslightshq.com/ultimate-guide-christmas-laser-lights/
Or our Holiday Projector Guide explaining the five highest quality and most affordable projectors on the market – http://laserchristmaslightshq.com/best-laser-light-projectors/