Hytera's C-earset and microphone without vox.
List of compatible walkies
Hytera: PDM680, PNC460, PNC550, PNC560
Code: 25.2101.040
Code: 43.2101.078
Code: 63.2101.025
Code: 25.2101.056
Code: 43.2101.055
Code: 43.2101.034