Aerial 7 Sound Disk Sports Series Summit the seven peaks, hitting the gym, biking in the Rockies or going for a morning jog, the Sound Disk Sport Beanie will keep you cool and dry while delivering crisp, clear sound. Thin enough to fit under a helmet or stylish on its own. Adjustable speakers allow the flexibility to change their placement based on your activity. Slide the disk over your ears to fully engage or position the disk partially behind your ears to be aware of your surroundings. This beanie is the ultimate way to listen to music while being active. FEATURES Wicking fabric draws moisture away from your head allowing it to evaporate more rapidly. Engineered to deliver the highest-quality listening experience from your mp3 player or other music device. Built-in microphone for use with iPhone®, Samsung Galaxy, and other mobile devices. The Sound Disk is only 8.5mm thick and delivers a full spectrum sound experience. TECHNICAL SPECIFICATIONS Driver Diameter: 35mm Impedance: 32O Frequency Response: 20-20KHz Sensitivity (S.P.L.): 100±3dB (at 1KHz) Input Plug Diameter: 3.5mm Adapters: 3.5mm ~ 3.5mm iPhone® AERIAL7 was created in 2008 by three friends from different backgrounds who share a common vision for building unique audio products influenced by their passion for art, music, street culture, fashion and the active lifestyle that they live and breathe. Since AERIAL7 began, the team has strived to be at the forefront of emerging fashion and technology, introducing unique materials, finishes, original wearing styles and impressive acoustics that redefines the headphone as a fashion accessory. Working with the constant feedback of AERIAL7's team of ambassadors from around the world, AERIAL7 products are constantly evolving, influencing and challenging the headphone market. AERIAL7 has quickly become a fast growing music lifestyle company with business headquarters in Los Angeles, a design center in Australia and distributors in over 60 countries.