Check the listing for details. 2 X Full Duplex Helmet to Helmet Bluetooth Mesh Intercom Headset System FM Music. Color: Black, Condition: New. Listed at 159.99 USD. Feature Bluetooth 5.1 bluetooth chip,high performance and low power consumption.No delay connection,more stable connection and smoother transmission speed. Support changing signal channel switch.if one channel is not good.it could be change to another one. Distance covers 1000M.wider communication range,stronger penetration and stable signal in tunnels,steep slopes,high traffic flow highway and other obsctruction environment.6 riders group mesh intercom distance can reach 600-1000 meter. Support microphone sensitivity adjustment.there are 5 leavel of sensitivity setting,the default is leavel 3.Leave 5 has the highest sensitivity and is easiest to activate the system,while the leavel 1 has the lowest sensitiviry and is the most un sensitive to activate the system. Support music sharing.Support music sharing between two riders.share music played by one mobile to another device Support common sound.allows intercom,music and FM at the same time.when FM is turn on.FM could be heared in intercom mode.While paring well with phone.the music is allowed too in mesh intercom mode