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You'll put these small micro sites all over the place. Put them where you can, and they'll receive a signal and carry it back through a phone line or fiber more recently, whatever the case is. They'll carry it back to the heart of the radio system and then it'll be regurgitated. So you have all these mini linking radios to basically link the signal back because don't forget, not everybody has a 50 watt or 100 watt mobile radio. A lot of people are out on the street. If you're a firefighter in a building, the radio's on you. If you're a cop running down an alley, the radio's on you. You're in a building. So in most cases, the radios are actually portable radios. They're not base or mobile radios. Base radios make up the smallest number of radios. Mobile is the second largest pool and then portable is where the bulk of the radios are because everybody needs a portable radio. Not every firefighter needs a mobile radio. Every truck needs it, but they're more.