IfI Zen blue great Bluetooth that pairs easy to iPhone. It will stream hi-res files.
If you want to feed iPhone into dac you need the iPhone camera adapter. This will give you usb out from phone to go usb in to external dac. I use this into IfI hip dac portable dac amp to aux in on my Lexus and it sounds great. Exceeded all my expectations into the Mark Levinson system.