Hytera's Airtube earphone without vox.
List of compatible walkies
Hytera: AP515, AP585, BP515, BP565, AP515LF, AP525LF, BP515LF
Code: 01.2101.008
Code: 43.2101.084
Code: 43.2101.031
Code: 25.2101.037
Code: 43.2101.007
Code: 56.2101.002