I have not used, but I've found an article which says:
Like information indicated at Apple official store, as third-party, Esoruns adapters will identically let users connect devices with a Lightning connector to all 30-pin accessories. All those adapters support analogue audio output, USB audio, as well as syncing and charging, except Video output which Apples official adapter also does not work. The wholesale price is between 5 usd and 6.5 usd, much cheaper than Apples official price.
Read more:
http://www.sfgate.com/business/prwe...ty-Lightning-to-30-pin-Adapter-vs-4063862.php