Hytera's Airtube earphone without vox.
List of compatible walkies
Hytera: AP515, AP585, BP515, BP565, AP515LF, AP525LF, BP515LF
Code: 43.2101.010
Code: 25.2101.061
Code: 04.2101.015
Code: 56.2101.023
Code: 56.2101.032
Code: 25.2101.050