The unit was complete and seemed of decent quality for the price. The manual is absolutely worthless...obviously a translation issue. Not sure why these companies don't pay to have it translated properly. YouTube is your friend....The install is fairly straightforward once you get the gist of it. Took forever to install the first time but if you know what you are doing it wouldn't take more than an hour. The digital screen display is fairly sophisticated and shows alot of helpful info but again....a challenge to figure out how to use it. Again Youtube. Celsius readings only so you will need a cheat sheet if you are from the US.