# Lap Define "HOLD" Time?

**URL:** <https://community.ecumaster.com/t/lap-define-hold-time/2400>\
**Category:** ADU\
**Created:** [September 27, 2024, 10:26am UTC](https://community.ecumaster.com/t/lap-define-hold-time/2400 "2024-09-27T10:26:11Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![325racer](https://avatars.discourse-cdn.com/v4/letter/3/dc4da7/32.png) [@325racer](https://community.ecumaster.com/u/325racer)\
**Post date:** [September 27, 2024, 10:26am UTC](https://community.ecumaster.com/t/lap-define-hold-time/2400/1 "2024-09-27T10:26:11Z")

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How long does one have to HOLD the button to set Start/Finish when the button is set to “HOLD”?

I want to add a message screen when the Start/Finish set is activated. But want to know what the timing is?

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**Author:** ![michal.kowalski](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/michal.kowalski/32/36_2.png) [@michal.kowalski](https://community.ecumaster.com/u/michal.kowalski)\
**Post date:** [September 27, 2024, 11:14am UTC](https://community.ecumaster.com/t/lap-define-hold-time/2400/2 "2024-09-27T11:14:52Z")

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A button hold is recognized after 500 ms. However, you can simplify and make this process more robust by utilizing the _adu.track.userButtonDefinedTrackAcquiring_ channel. The detailed method is explained in section 19.5 of the ADU Manual: [https://www.ecumaster.com/files/ADU/adu\_manual\_en.pdf](https://www.ecumaster.com/files/ADU/adu_manual_en.pdf). You can adjust this approach to achieve your desired result.