In order to use the Tactical Headsets with Motorola MXP600 an update is required.  

For optimal performance of the neckmic with the Motorola MXP600 in noisy environments, follow these steps to reprogram:

1. Activate programming mode on your MXP600 and connect it to your computer using the CPS software.

2. Double-click the _Hotfix_V2.hfx file. This will prompt the CPS to apply the hotfix to the radio.

3. Your device is now configured for use with Tactical Headsets and ready to be utilized in challenging noise conditions.