I bought the intergatr from J&M with the half helmet set up. It is a portable unit that fits on your belt. It allows a number of accessories, ipod, gps, cell, with vox technology. It also has a built in radio tuner, but it's not all that great outside of the city. The speakers are not the best for music, kinda tinny, but the vox works great and comm between me and wifey is great. I opted out of the rechargeable battery packs due to price. It runs on AA batteries so not hard to replace when needed. Can be powered from 12v source as well. It's a bit pricey, but we really like it.