# Did you know your Casio G-Shock watch has a tilt light "auto illumination" function? **URL:** \ **Category:** Miscellaneous and Personal Stuff I Must Share\ **Created:** [January 22, 2017, 8:56am UTC](https://boards.straightdope.com/t/did-you-know-your-casio-g-shock-watch-has-a-tilt-light-auto-illumination-function/777813 "2017-01-22T08:56:03Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![astro](https://avatars.discourse-cdn.com/v4/letter/a/9dc877/32.png) [@astro](https://boards.straightdope.com/u/astro)\ **Post date:** [January 22, 2017, 8:56am UTC](https://boards.straightdope.com/t/did-you-know-your-casio-g-shock-watch-has-a-tilt-light-auto-illumination-function/777813/1 "2017-01-22T08:56:03Z")
I’m surprised by how many G-Shock owners don’t know this. It’s also a good way to sort out fake G-Shocks as most fakes do not have this function… Most G-Shocks have function you can turn on and off where you can tilt your wrist slightly as if you are reading the time and the light will come on automatically and go off when you straighten your wrist. You can consult your manual for “auto illumination”. Manuals here [http://support.casio.com/en/manual/manuallist.php?cid=009](http://support.casio.com/en/manual/manuallist.php?cid=009) ---
**Author:** ![Darren\_Garrison](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/darren_garrison/32/92_2.png) [@Darren\_Garrison](https://boards.straightdope.com/u/Darren_Garrison)\ **Post date:** [January 23, 2017, 12:12pm UTC](https://boards.straightdope.com/t/did-you-know-your-casio-g-shock-watch-has-a-tilt-light-auto-illumination-function/777813/2 "2017-01-23T12:12:07Z")
Yeah, and after a day or two of having the light come on every time you tilt your wrist slightly, you turn that feature off. (I did.) That feature may be genuinely useful for the real killer of Richard Kimble’s wife, but few other people. ---
**Author:** ![BwanaBob](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/bwanabob/32/2985_2.png) [@BwanaBob](https://boards.straightdope.com/u/BwanaBob)\ **Post date:** [January 23, 2017, 1:59pm UTC](https://boards.straightdope.com/t/did-you-know-your-casio-g-shock-watch-has-a-tilt-light-auto-illumination-function/777813/3 "2017-01-23T13:59:58Z")
It’s a great battery killer. I turn it off. ---
**Author:** ![chrisk](https://avatars.discourse-cdn.com/v4/letter/c/6de8d8/32.png) [@chrisk](https://boards.straightdope.com/u/chrisk)\ **Post date:** [January 23, 2017, 2:30pm UTC](https://boards.straightdope.com/t/did-you-know-your-casio-g-shock-watch-has-a-tilt-light-auto-illumination-function/777813/4 "2017-01-23T14:30:01Z")
Heck, I didn’t even know I had a G-Shock watch until you told me! 😉