Hytera's Airtube earphone without vox.
List of compatible walkies
Hytera: AP515, AP585, BP515, BP565, AP515LF, AP525LF, BP515LF
Code: 10.2101.003
Code: 43.2101.083
Code: 70.2101.003
Code: 56.2101.002
Code: 80.2101.004
Code: 63.2101.045