I bought a couple of these from Deals Direct as I wanted a simple lit tree to go on either side of my front door. The supplied plugpack is 24V AC. Looks like the rectifier is inside the in-line on/off switch. I haven't tried running the tree from DC yet to see if it's in the 24V - 30V range like other light sets. The tree arrived in a flat box about 60cm x 60cm x 8cm. Assembly is quick as the lights are already on it. You just need to click the base and pole together and attach the supplied baubles if desired.