Hytera's C-earset and microphone without vox.
List of compatible walkies
Hytera: AP515, AP585, BP515, BP565, AP515LF, AP525LF, BP515LF
Code: 04.2101.003
Code: 56.2101.033
Code: 25.2101.045
Code: 80.2101.008
Code: 43.2101.036
Code: 04.2101.001