The Astro A40 TR headsets can easily be updated to adapt to distracting environments by adding optional A40 TR 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 Headband. All TR products are used by top professional teams like Counter Logic Gaming. MixAmp not included.