bubble pack

FRS/GMRS: There's a couple of kids that have continued using their bubble packs, on and off, for more than a year since I've been at this location. Of course, they ramp up operations during breaks; especially over Christmas. Adults are apparently getting bubble packs and Bull Frog radios around...

What bandwidth do "bubble pack" radios use to transmit on the interstitial channels 1-7? All the bubble packs are combo GMRS and FRS radios these days, and unlicensed users can transmit on the shared interstitial FRS / GMRS frequencies (usually channels 1-7) as long as they have their radios set...