# Morse Micro MM-HL1-EXT Performance in Underground Carparks

**URL:** <https://community.morsemicro.com/t/morse-micro-mm-hl1-ext-performance-in-underground-carparks/770>\
**Category:** Hardware\
**Tags:** halowlink-1\
**Created:** [August 20, 2025, 3:08pm UTC](https://community.morsemicro.com/t/morse-micro-mm-hl1-ext-performance-in-underground-carparks/770 "2025-08-20T15:08:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![balaji-dtech](https://avatars.discourse-cdn.com/v4/letter/b/cab0a1/32.png) [@balaji-dtech](https://community.morsemicro.com/u/balaji-dtech)\
**Post date:** [August 20, 2025, 3:08pm UTC](https://community.morsemicro.com/t/morse-micro-mm-hl1-ext-performance-in-underground-carparks/770/1 "2025-08-20T15:08:49Z")

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We’re testing out the MM-HL1-EXT to provide internet to devices in an underground carpark with concrete walls, pillars, and ramps.

The official range specs are based on open-field tests, but we’re more interested in how it performs in real-world, obstructed environments. Has anyone used these in similar setups? Any feedback on range or signal strength in places like basements or multi-level carparks would be super helpful.

Appreciate any insights!

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**Author:** ![flex84](https://avatars.discourse-cdn.com/v4/letter/f/ad7895/32.png) [@flex84](https://community.morsemicro.com/u/flex84)\
**Post date:** [September 10, 2025, 4:04am UTC](https://community.morsemicro.com/t/morse-micro-mm-hl1-ext-performance-in-underground-carparks/770/2 "2025-09-10T04:04:46Z")

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Hi @balaji-dtech, curious to know how that testing in an underground carpark went?

I would expect that the signal would struggle to penetrate through thick concrete walls in basements, but should be able to find multi-path by bouncing of walls.