The Interphone F2S City is the most practical and safest helmet hands-free kit for riders who only need to listen to their favourite music or use their mobile phones while riding in the city or during their short-distance trip. Interphone F2S City connects to mobile phones through Bluetooth® and allows communication at high speeds thanks to the wind-shielded microphone and noise filtering device. It is waterproof, dustproof and mud resistant (IP76 certified), and fits all helmets! Interphone F2S City and all the Interphone range, comply with CEI EN 60529/1997 (ex CEI 70-1), are the only ones certified as IP 67 (totally waterproof and dustproof).