Hytera's Airtube earphone without vox.
List of compatible walkies
Hytera: AP515, AP585, BP515, BP565, AP515LF, AP525LF, BP515LF
Code: 43.2101.070
Code: 43.2101.034
Code: 01.2101.008
Code: 04.2101.013
Code: 43.2101.043
Code: 56.2101.030