Well at super cheep auto they have these digitalk 40ch UHF cb radios for .99 they once were . They have a 3km range, and for 5 bucks extra you get a VOX headset, which is an ear bud and a microphone similar to a cars hands free kit. vox works pretty well although you have to say somethign to turn it on then speak as theirs a delay with cb's as most will know, never say DONT SHOOT as soona as you push the button as a NY SWAT team member found out when all his snipers heard was shoot when the crookw alked out of the bank But anyway im gona put some velcro in the helmet and on the back of the microphone so it sits inside the helmet and test out how good it works. so 50 bucks for a bike to bike, or rider to pillion cb intercomm