The device consists of a double-charger for iPhone and iPad (in my case an iPad 3 and iPhone 4). you simply put the charging station, you naturally want to first replace the two plastic adapter. without violent turn that did not work with me, so I once glanced in the instructions. there the exchange is completely ignored, you have to try himself (in excess of the threshold of pain at the levers). the charging function to be working fine. thanks to strong power adapter recharges itself the iPad 3 in a very short time. are the inserted device is full, switch to trickle charge.
However, to say that almost 50 euros for a plastic housing with two connectors plus an AC adapter but a bit overpriced. with 30 euro you would actually be good at it.