Description HJC has developed two HJC-specific intercoms in collaboration with Sena – a renowned name for communication and intercom systems. Obviously, this duo finds its place best in a HJC motorcycle helmet. Anyone who is satisfied with the basics (and yes) will choose the basic model. From a technological point of view, it is similar and based on Senas SMH5 and will serve you well. If you want more (group chats, radio, etc.), choose the 20B. The intercoms are specially designed for installation in the HJC helmets designated for this purpose: HJC RPHA-11 Carbon, HJC RPHA-70 Carbon, HJC RPHA-90S (carbon), HJC F70 (carbon), HJC I100, HJC I90, HJC V90, HJC C90. 80, HJC C91, HJC I20, HJC I30 You can recognise these helmets by the inscription "Smart HJC" under which the intercom is placed. Intercom bike-to-bike up to 2 bikers and 400 m. With Senas Advanced Noise Control™, the volume adjustment automatically adjusts to ambient noise and speed. Thanks to universal intercom pairing, it is possible to communicate with intercoms from other brands. Connection with Bluetooth devices. Can be connected to two Bluetooth devices simultaneously, e.g. a navigation system, an A2DP music player or a smartphone. Voice recognition, answer/reject incoming calls. Music functions A2DP/AVRCP, wireless music streaming from navigation system or phone. Music sharing: driver and passenger listen to the same music in stereo. Other Features Adjust settings and receive software updates via the HJC Bluetooth Device Manager Bluetooth 3.0 In the box: Module 10B Cable and Hybrid Microphone Micro USB Cable Quick Start Guide General Note: The world of electronics (intercoms, smartphones, GPS, etc.) is changing so quickly that it is possible that certain (outdated) devices are incompatible at certain levels. Unfortunately, the manufacturer cannot provide us with data on intercoms / GPS / smartphones that have problems with each other. A regular update of all electronic devices is therefore advisable to avoid problems as much as possible.