Can the lighting power input be used to power USB devices and passive hub?

I can not figure out the full function of the ligning power input on the camera adaptor?
In description the port is used to power the phone/Ipad.
But I figured out that I can use a midi keyborad or an audio interface with the adaptor. It only works if I use a power source connected to the lightning port (Ipad charger). It seems like the power adaptor also power the slave device (MIDI or audio interface etc.).
Does it mean that I can power a usb hub through the lightning port on the camera adaptor or do the lightning port only charge the iphone/Ipad?

  • Asked by fn
Lightning to USB Camera Adapter

Lightning to USB Camera Adapter

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