Using the LG UltraFine 5K Display with older macs: Will the Built-in stereo speakers, camera, and microphone operate with the same specs?

It has been post that with the Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter and a Thunderbolt cable, you can use the LG UltraFine 5K Display at 4K and lower resolutions with older Mac models.

Will the Built-in stereo speakers, camera, and microphone operate with the same specs on the older macs?

LG UltraFine 5K Display

LG UltraFine 5K Display

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