The SMART HJC 20B features a staggering one-mile range, advanced Bluetooth 4.1, and a built-in FM radio tuner. Stay in con-tact by calling hands-free on your Bluetooth phone, rock out to your favorite riding jams in stereo, or listen to voice instructions of GPS navigators by Bluetooth wirelessly, all while having conversations in full duplex with a passenger or other riders.The Smart HJC 20B  features Bluetooth 4.1 technology  
with dual Bluetooth communication modules increases the performance and reliability of the headset while also allowing for increased high definition audio quality. The advanced Audio Multi-tasking allows for a seamless blend of incoming and outgoing audio to create a mixed audio experience versus the traditional interruption-based audio technology of other Bluetooth devices. The audio multitasking function creates the most close-to-natural audio sound while running multiple audio functions simultaneously and intelligently. With the SMART HJC 20B and 10B, users can call handsfree with their Bluetooth mobile phone, listen to stereo music or voice  instructions of GPS navigation by Bluetooth wirelessly, and have intercom conversations in full duplex with a passenger or other riders.