Hytera's Airtube earphone without vox.
List of compatible walkies
Hytera: AP515, AP585, BP515, BP565, AP515LF, AP525LF, BP515LF
Code: 04.2101.018
Code: 25.2101.048
Code: 63.2101.028
Code: 43.2101.014
Code: 72.2101.002
Code: 43.2101.086