Check the listing for details. HJC 20B Smart Bluetooth Communication System | SMART20 BLK Sena-Integrated. Color: Black, Condition: New. Listed at 299.99 USD. The Smart HJC 20B features a one mile range, advanced Bluetooth 4.1, and a built in FM radio tuner. Stay in contact by calling hands free on your Bluetooth 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 multitasking 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.