Just Installed JY-UQS07N4G-B ... questions
#1
First, I have the nighttime brightness setting turned all the way down to 0, but it's still brighter than I'd like.  Is there a way to lower the brightness even further?

Second, I'd like to change the ringtone, but can't find the setting to do that.

Third, is there a way to turn the unit completely off?

https://www.joyingauto.com/joying-newest-9-universal-single-din-car-music-stereo-with-1280-800-ultra-screen.html
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