Truckers responded “10-4” on what 70s device?

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Before cell phones, dispatchers used the CB radio to connect with truck drivers, taxi drivers, and emergency personnel. Drivers would respond “10-4” as confirmation that the message was received.
CBS/Getty Images
CBS/Getty Images
Truckers responded “10-4” on what 70s device?
- Transistor radio
- Walkie-talkie
- CB Radio
- Cell phone
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