The audio kit compatible with Schuberth helmets (C3, C3PRO and E1) has an ultra-thin design and is compatible with Tour Interphone, Sport, Urban, Link and Avant. For use with Active and Connect it is necessary to purchase KITADBRACKETF10SP. The kit is equipped with the noise-canceling system for noise cancellation, which reduces unwanted ambient sounds for a relaxing and enjoyable riding experience. Easy to install, the kit adheres perfectly to the inside of the helmet. Hi-Fi audio, Hi-Tech microphone and double earphone make the kit very powerful.