This cable is equipped with a modified waterproof Lightning connector. It is designed to fit only with Andres Industries aiShell cases (only models with Lightning connector - see this other cable for USB-C cases).
It maintains complete waterproofness of aiShell case when it is plugged in.
The other end of the cable is a standard type-A USB connector for use with the waterproof USB power adapter for exterior charging. Please note however that the USB plug itself is not waterproof and needs to be protected.
You can use a standard USB cable extender if necessary.
The cable can also be used with Apple's original wallcharger or any iPad compatible USB charger.