HJC Smart 20B Communication System Single Set Smart HJC 20B is a Bluetooth communication system developed in collaboration with SENA specifically for HJC helmets. Smart HJC Bluetooth 20B can be installed in the various models of HJC. Due to the compact size and aerodynamic design of the Bluetooth unit, it improves the overall appearance and aerodynamic design. Based on Senas best-selling 20S model, the 20B model provides an optimal Bluetooth environment with intuitive operation and easy installation of the device. Enjoy the multifunction of the Smart HJC 20B: making calls, listening to music, GPS guide and intercom. Features: make calls, listen to music, GPS guide and intercom Smart HJC 20B offers various functions such as a group intercom for an optimal driving experience. With the Universal Intercom™, Smart HJC 20B can be connected to various Bluetooth communication devices. The Noise Control™ function effectively suppresses wind noise and other noise during intercom or phone calls and maintains high audio quality. with the dual blue Bluetooth chip in the Smart HJC 20B allows you to conduct intercom calls and listen to music at the same time via audio multitasking™. With Audio Multitasking™, the music volume is automatically reduced at the start of the call and resets to the original volume at the end of the conversation. Group intercom: You can also communicate with 7 drivers at the same time within a maximum range of 1.6 km. Specifications: Bluetooth: 4. 1 Audio Multitasking™ Voice Commands Intercom Range: 1.6 km Eight-way Communication Music Sharing Advanced Noise Control™ FM Radio Compatible with Remote Control Compatibility: HJC RPHA 11 Carbon HJC RPHA 70 Carbon HJC RPHA 90s Carbon HJC F70 Carbon HJC RPHA 90s HJC F70 HHJC i9 0 HJC V90. Box contents: 1 x HJC Smart 20B communication system. 1 x battery. 1 x gooseneck microphone. 1 pair of speakers