The New A40 Tr Headset Can Be Adapted To Any Environment By Adding Astro Mod Kits. For Loud Pro Tournaments, You Can Transform The A40 Tr From An Open-Back To A Closed-Back Noise-Cancelling Headset By Swapping Mod Kit Components Including Noise-Cancelling Ear Cushions, Voice Isolating Mic, Closed Back Speaker Tags And A Padded Headban.