I just installed a Starcom 1 system. I havent tried it at speed yet as it is still winter here. Came with two stereo speaker and mic setups for 2 helmets. Everything mounts inside and with a little time and ingenuity you can hide all the wires. You still have to use a plub from the helmet to a mounting bulkhead on the bike. I have VOX on up to 6 accesories. with music playing if you start to talk it mutes the music(or any other accesory) you can even get an adapter for your phone that will allow you to plug it in and answer calls(autoanswer on the phone has to be on) A secondary unit needs to be installed for bike to bike communication. The unit also has an automatic volume adjuster for wind noise, although i dont know how well this works yet. I'll have to update this post once i get to actually use it on the road and not just in my garage.