My setup consists of an Astro A40 TR and a Mixamp Gen4. If you purchase the Astro A40 headset without also purchasing the Mixamp (external sound card), you will be unable to use any of the features of the headset. If you take away the mixamp, this is a standard, high-quality stereo headset. The size is quite versatile and can be adjusted to fit virtually anyone's head. The cups turn in accordance with the contours of the head. The A40 is a bit on the heavier side, but it does not make the wearer uncomfortable. Ears are unable to perspire.