You’ve never heard "True" wireless headphones like these very first EXTW37 professional studio wireless headset unit. Incorporated with Cutting-edge High Precision Audio ensures you’ll hear every note, just as it’s intended. The new maximum isolation wireless headset delivers 37 dB of passive attenuation. What you don’t hear is just as remarkable as always. You’re one with the music and this time no strings attached. Extra long battery life – up to 50 hours, depending on how the unit is used, even at high volume – ensures you’ll always be ready to listen. Additionally, enjoy our isolation built-in mic that allows you to answer your calls or speak to your vocal room.