Squad! The time has come to suit up and jump into battle! Adapt the ASTRO A40 TR Headset to any situation with the Call of Duty Mod Kit. For loud environments such as pro tournaments, gamers can transform the A40 TR to a closed-back, noise-isolating headset with sealed Speaker Tags, synthetic leather ear cushions and headband, and a voice-isolating microphone. All TR products are the Official Equipment of Call of Duty.