The new ASTRO A40 TR Headset and MixAmp™ Pro TR feature increased user customization to adapt to any environment. Ready for home use, LAN play or the loudest pro tournament, you can transform the A40 TR from an open-back to a closed-back noise-cancelling headset by swapping components like Speaker Tags, microphone and ear cushions (sold separately in ASTRO Mod Kits). For serious livestreamers, the MixAmp™ Pro TR is re-engineered with all digital components for lag and interference free operation. Number 3 - Razer Mamba -.