Please note:
Tactical headsets is divided into two standard: military standard and non-military standard(civilian).
Generally, military and civilian equipment cannot be perfectly matched and connected, so please confirm the version of your headphones before placing an order. 
The US NATO military plug is the one that's 7.1mm wide and looks like a big 3.5mm plug with 4 connections.
This adapter allows music to be played in any us nato wired headset with the standard tp-120 plug.
Any music device using a 3.5mm jack will work.
Play music using your radio, mp3 player, etc. Those with dual com head sets can listen to music while patrolling!
The outer shell is made from glass filled nylon and is nearly indestructible.
Comes with a 24" 3.5mm dual stereo plug extension cord to plug directly into your 3.5mm music device.
Use it at the range, work, or home. 

Package include:
1 × Adapter cable 

Note:

This product does not include headphones and mobile phones.