Check the listing for details. HJC Smart 20B Bluetooth Intercom - Black. Condition: New. Listed at 427.90 USD. SMART HJC Bluetooth 20B can be installed on HJC's various models and due to compact size and aerodynamic design of the Bluetooth unit, it enhances overall look and aerodynamic design of the helmet. Based on SENA's best-selling model 20S, the 20B model provides 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. The SMART HJC 20B provides various functions such as group intercom for optimum riding experience. With the Universal IntercomT SMART HJC 20B can be connected to various Bluetooth communication devices. The Noise ControlT feature suppresses wind sound and other noises effectively during intercom or phone calls maintaining the high audio quality. Wit.