A connection cable for the Interphone with 3.5 mm audio input for those who use the helmetless intercom during outdoor activities. If you have headphones with 3.5 mm microphone & connector & want to use them with Interphone products, this versatile cable is for you. Very useful for cycling or playing your favorite sports! Suitable for Interphone Tour Interphone Sport Interphone Urban Interphone Link Interphone Active Interphone Connect Interphone Avant