Just got one of these to go with my Samsung NC10 netbook computer. This product is a standard laptop type CD/DVD drive, put in to a case, with a USB interface tacked on to the back. On the back of the box is a USB connector, and a supply connector. Supplied was a USB lead, a USB A to power connector lead, and a mains power supply. The unit works fine with just the USB connected, with the power connector not used. However, some PCs may not be able to provide enough current, and it's then that you need to connect either the of the power leads.
The drive itself is made by LG. It's a model GSA-T40N. There are no instructions in the box, but none are needed. I plugged it in to my Windows XP PC, and it worked fine without any drivers or other complications. The cardboard box it's supplied in from the factory, is the only packaging you get. This is not a problem, as there's some good foam packaging inside. The box has no manufacturer's uidentification. Likewise, the unit itself only has the Qubz logo on it in one place. No other identification.
The small circuit board in the box, on the back of the drive, privides the USB interface. Rather curiously, this is badged Sonny. Yes, that's right. Double N. No idea who they are.
All in all, this is a good product, at a good price. Buying from Computer Trading was hassle free too. Five stars.