Anti-Radiation Binaural Earphones, Aircom A3 Universal 3.5mm Noise Cancelling Air Tube Acoustic Stereo Earbuds Headphones with Microphone (Active Black) - US Patent # 6453044 Anti-Radiation Binaural Earphones, Aircom A3 Universal 3.5mm Noise Cancelling Air Tube Acoustic Stereo Earbuds Headphones with Microphone (Active Black) AIRTUBE - A patented sound technology using an air-filled hollow tube to increase air space and sound development which produces more body and delivers a "Live" listening experience. MICRO EARBUDS - One of the smallest earbuds on the market due to the use of the airtube technology which puts the speaker in the sound chamber and not in the actual earbud. MIC/SWITCH - Built-in microphone with ON/OFF switch. GUNMETAL FINISH - Triple coated semi-gloss gunmetal finish. 100% Customer Satisfaction. Fast Same-Day Shipping by 12:00 PM PDT. 12 Months Warranty.