The world's best selling 2-way communication system, Cardo has increased its range to 500m (0.3mi) with the ability to connect to any Bluetooth headset. With only 16mm top to bottom, FREECOM 2+ aerodynamic, IP67 waterproof design, makes the other Bluetooth headsets look like blunt tools. Customizable volume-per-mode for music, radio, mobile and intercom. Customizable speed dial and multilingual spoken status announcements about battery level, radio and connected devices. Multilingual built-in menus for easy operation and customization. Receive in-helmet navigation instructions from compatible GPS.; Single Unit 1-2 Rider Connections Interchangeable hybrid and corded microphones in the same package to suit virtually any helmet type Superb HD audio quality with replaceable, ultra-thin 40mm speakers and 3.5mm jack Fully waterproof and dustproof - IP67 certified Bluetooth 4.1 Allows intercom conversation with non-cardo headsets Built-in FM radio 13 Hours of talk time