Listening to your favorite music from your smartphone while biking is great, but letting your riding companion listen too (Music Sharing) is fantastic. Answering and making calls, as well as controlling mobile devices with just one finger or via voice command, is incredibly convenient. Your conversation partners will hardly believe that you are chatting while biking. It features 40 mm flat speakers and an advanced processor. The volume automatically adjusts to ambient noise. For example, enjoy the full sound of Vivaldi at high highway speeds and muted audio while waiting at a traffic light. The rider-to-rider Bluetooth communication system has a range of up to 400 meters. Your passenger can also listen in on the playlist or radio station. Enjoying music together is almost as nice as biking together. Out of breath from charging? Low battery? Simply connect the device to an external power source or a 12V charger and turn it back on. The device will charge while you ride. It includes an integrated FM radio with RDS, so the strongest signal is automatically selected, whether you're in the city or in the middle of nowhere. Your device can connect with virtually all Bluetooth headsets on the market. You can incorporate incoming calls into an ongoing intercom conversation. With this feature, all your friends stay within reach. Keeping your device up to date has never been easier. Use your Cardo Connect app to download and install the latest software directly onto your Spirit HD. No cables required. No matter what conditions you expose it to, your waterproof Spirit can handle everything and maintain your connection. Rain, sunshine, mud, dust, or snow.