I bought 2 pumps and these are AC variable speed pumps, I came across a video on youtube about these pumps and I really liked what I saw, I know everyone uses D/C pump and I am using and have used DC pumps in the past as well with good and bad experiences, so I wanted to give pump try, brand is Periha Variable speed AC pump, it does 5900 gallons/ hr at highest setting at 160w and lowest I can go is 5000 gallon/ hr at lowest wattage, pumps seems like built well and driver is built out of aluminum housing with heatsink, driver feels really heavy and nicely built, tank is not small pump either and it heavy and built nicely, it comes with all the plumbing adapters, I have 2 pumps, 1 for my DIY protein skimmer and it is going to drive 1.5" venturi and this skimmer is big that I built 2 years before. I will upload pictures later when it comes to tackling that project and 2nd pump is going to drive my sea swirls in the sump for water agitation and over rock work in sump water movement.. here are the pictures of the box opening of the pump...