Hytera's C-earset and microphone without vox.
List of compatible walkies
Hytera: AP515, AP585, BP515, BP565, AP515LF, AP525LF, BP515LF
Code: 43.2101.058
Code: 56.2101.001
Code: 25.2101.056
Code: 25.2101.058
Code: 43.2101.075
Code: 63.2101.056