TELEX 5x5 Pro III Good Sound Headset. Ultra-lightweight headset with an incredible on-the-head weight of only ¾ oz. High-quality electret mic provides maximum talk power, unparalleled noise cancellation and immunity to 400-HZ hum. Boom Mic is bendable for exact positioning of the mic close to the mouth for maximum speech clarity and an unobstructed peripheral view for the pilot. May be worn 3 ways: with headband, on eyeglasses, or with earmold (Kit #EDIB). FAA/TSO approved.