SMART HJC 20B is a Bluetooth communication system co-developed with SENA tailored specially for HJC’s helmets.SMART HJC Bluetooth 20B can be installed on HJC’s various models and due to the compact size and aerodynamic design of the Bluetooth unit, it enhances the overall look and aerodynamic design of the helmet. Based on SENA’s best-selling model 20S, the 20B model provides an optimal Bluetooth environment with intuitive operation and easy installation of the unit. Please enjoy SMART HJC 20B’s multi-function: phone call, listen to music, GPS guide, and intercom.