Acoustic Air Tube Headset PTT Fit for HYT TC-518 TC-580 TC-600 TC-610 TC-618? 100% Brand new and high quality. Product Shape: Same as the picture show Hytera HYT TC510 PD500 Transparent Air Tube Earphone In ear Feature: 1. Long clip mesh surface PTT design, air duct design, large PTT button feels good, durable, stylish and generous 2. High quality detachable air duct transmits voice, durable and more comfortable to hear, no fatigue for long term wear 3. The concealment effect is good, which is conducive to the confidentiality