# Q: What is the difference between PID automatic output ratio and manual output ratio?

**URL:** <https://community.inkbird.com/t/q-what-is-the-difference-between-pid-automatic-output-ratio-and-manual-output-ratio/95>\
**Category:** Questions & Answers\
**Tags:** smart-controller\
**Created:** [October 15, 2021, 2:51am UTC](https://community.inkbird.com/t/q-what-is-the-difference-between-pid-automatic-output-ratio-and-manual-output-ratio/95 "2021-10-15T02:51:25Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![INKBIRD](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.inkbird.com/inkbird/32/366_2.png) [@INKBIRD](https://community.inkbird.com/u/INKBIRD)\
**Post date:** [October 15, 2021, 2:51am UTC](https://community.inkbird.com/t/q-what-is-the-difference-between-pid-automatic-output-ratio-and-manual-output-ratio/95/1 "2021-10-15T02:51:25Z")

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A: 1. The automatic output ratio will automatically change

1. The manual output ratio can be set arbitrarily