It's a simple concept. You have a plastic case back, and over the camera cut-out there's a threaded ring. A tubular lens body and LED light attachment screws into it, giving you 60x optical zoom and illumination so you can take some wild close-up shots of anything that fits under the lens. The lens tube and LED assembly comes with a tiny pleather carrying pouch to keep it from getting grungy in your pocket or bag.
The lens tube is easy to screw on and off, the case is easy to snap on and off, but neither will fly apart during normal use. It's a little tricky to get focused, but I've found a solution that seems to work. Zoom your camera app the whole way in to 4x, and extend the focusing tube the whole way. Place the end of the tube on whatever it is you're taking a picture of, and slowly slide the tube back into the body until you get a clear picture. The area of crisp focus is small, but there's enough detail you can crop out the center and still have an interesting picture.