60-100X Zoom Microscope converts your iPhone 4 into a portable microscope. Magnification up to 100X, Focus Dial, Pocket-sized for portability, LED with ON / OFF Switch. The microscope attaches via a dedicated back case on iPhone 4. It's powered by 3 LR1130 Button Cell batteries
The threaded rim that attaches to the photo case has snapped off. You can either hold it onto the case or it could be glued but then you wound't be able to collapse it for storage. Doesn't affect use, just inconvenient.