RadTech 13-860 ProCable Shortz Dock Extender for iPhone, iPod and iPad - Black
I purchased this to use specifically with the Lifeproof iPhone case as it is recommended by the manufacturer. While it fits, the fit is not ideal. The little door on the case, even when wide open, pushes somewhat on the extender. This makes it difficult to put in place and difficult to remove. It works, it's just not an ideal fit and makes using it cumbersome. Additionally, it does not appear to be solidly made and I don't believe it will last a long time....