DK-QCC5124-GAHS-A-0 has two mics in each side or only one side?
raymond_lk, Welcome to the Digi-Key TechForum.
The earbuds have a speaker in each earbud, but there is no mention of a microphone.
These are designed for bluetooth listening. If you are using these for a phone call, I believe the microphone in the phone would have to be used for voice transmission.
Per this document the product in question includes two mics on the right side only.