I bought this product for iPad Pro 12.9" 3rd Gen to have USB-C usability with improve older products. All ports work as expected. Plugging in headphones is recognized immediately in the latest iPad OS, and removing the headphones stops the music/playback as expected. HDMI is a 4K export cable (30 fps in my test) and charging works as expected. My only complaint is that the adapter can wobble a bit due to the small gap between the base of the iPad and the adapter. Additionally, this adapter can provide additional required ports at a fraction of the cost compared to Apple's solutions.
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