Hytera's C-earset and microphone without vox.
List of compatible walkies
Hytera: PDM680, PNC460, PNC550, PNC560
Code: 63.2101.037
Code: 25.2101.059
Code: 43.2101.034
Code: 43.2101.036
Code: 04.2101.016
Code: 43.2101.077