# I just bought a clock radio that sets its own time. How does it do that?

**URL:** <https://boards.straightdope.com/t/i-just-bought-a-clock-radio-that-sets-its-own-time-how-does-it-do-that/505131>\
**Category:** Factual Questions\
**Created:** [August 3, 2009, 4:14am UTC](https://boards.straightdope.com/t/i-just-bought-a-clock-radio-that-sets-its-own-time-how-does-it-do-that/505131 "2009-08-03T04:14:48Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![LouisB](https://avatars.discourse-cdn.com/v4/letter/l/dfb087/32.png) [@LouisB](https://boards.straightdope.com/u/LouisB)\
**Post date:** [August 5, 2009, 1:25am UTC](https://boards.straightdope.com/t/i-just-bought-a-clock-radio-that-sets-its-own-time-how-does-it-do-that/505131/21 "2009-08-05T01:25:45Z")

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Where would we be without 5.0 MHz 5th overtone quartz crystal controlled oven stabilized clock oscillators?

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