The Apple iPhone Micro USB Adapter allows you to use third-party micro USB cables and chargers to sync or charge your iPhone. Simply connect your iPhone to the Micro USB Adapter, then connect a micro USB cable or charger to the Micro USB Adapter. Product Description iPhone Micro USB. Compatible with: iPhone 4, 4S, 3G, 3GS, iPad 2G, and 1G. Does not Work with Lightening cables or any other dock.