Listening to your favorite music from your smartphone while biking is great, but being able to share it with your passenger (Music Sharing) is even better. You can receive and make calls and control mobile devices with just one finger or through voice commands. Your conversation partners will hardly believe they are chatting with you while you bike. The 40 mm flat speakers and enhanced processor automatically adjust the volume to the surrounding noise. 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. Sweaty from riding? 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 features an integrated FM radio with RDS, ensuring 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 integrate 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 the conditions you expose it to, your waterproof Spirit can handle it all and maintain your connection. Rain, sunshine, mud, dust, or snow.