# 5GHz bandwidth/channel width - what are the supported values? - 20,40, 80 MHz etc?

**URL:** <https://forum.amebaiot.com/t/5ghz-bandwidth-channel-width-what-are-the-supported-values-20-40-80-mhz-etc/3758>\
**Category:** SDK\
**Tags:** rtl872xd\
**Created:** [January 28, 2025, 11:31pm UTC](https://forum.amebaiot.com/t/5ghz-bandwidth-channel-width-what-are-the-supported-values-20-40-80-mhz-etc/3758 "2025-01-28T23:31:35Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![airista\_islavov](https://avatars.discourse-cdn.com/v4/letter/a/e95f7d/32.png) [@airista\_islavov](https://forum.amebaiot.com/u/airista_islavov)\
**Post date:** [January 28, 2025, 11:31pm UTC](https://forum.amebaiot.com/t/5ghz-bandwidth-channel-width-what-are-the-supported-values-20-40-80-mhz-etc/3758/1 "2025-01-28T23:31:35Z")

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Hi,  
I am not seeing any info about bandwidth/channel width with 5GHz in Ameba-D SDK.

What channel widths are supported? I can’t clearly see this in the documentation.  
in the context of Ameba-D SDK do I need to set bandwidth explicitly or is bandwidth negotiated automatically with the AP on the specific channel?

Thanks,  
Ivan