These are brand new out duchinni D909 helmets, they are bluetooth equiped so you can link your mobile phone, sat nav (if it supports bluetooth) and another bluetooth helmet together so you can talk to your pillion, or even to your mate whos riding with you. there fully intergrated so not just a bluetooth unit stuck on the side. you hardly know it has it. they have earphones and microphone included and you can set your phone in to listen to music. comes with everything you need including charger so no swapping batterys around, just plug it in and leave it to charge. finaly everything is controlled from easily accesible buttons on the side of the helmet.