# HaLowLink-1 uses 3V3 or 4V3 for VFEM?

**URL:** https://community.morsemicro.com/t/halowlink-1-uses-3v3-or-4v3-for-vfem/534
**Category:** Hardware
**Tags:** halowlink-1
**Created:** [May 8, 2025, 10:13pm UTC](https://community.morsemicro.com/t/halowlink-1-uses-3v3-or-4v3-for-vfem/534 "2025-05-08T22:13:18Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Arvind](https://avatars.discourse-cdn.com/v4/letter/a/a6a055/32.png) [@Arvind](https://community.morsemicro.com/u/Arvind)
#### Post date: [May 8, 2025, 10:13pm UTC](https://community.morsemicro.com/t/halowlink-1-uses-3v3-or-4v3-for-vfem/534/1 "2025-05-08T22:13:18Z")

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I did range test with HaLowLink-1 and it seems pretty good. I was wondering if the VFEM in HaLowLink-1 is using 3V3 or 4V3. I am asking as while doing power measurements for HaLow using EKH-05 V3, I found that VFEM has two power options.

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### Author: ![Zandr](https://sea1.discourse-cdn.com/flex001/user_avatar/community.morsemicro.com/zandr/32/42_2.png) [@Zandr](https://community.morsemicro.com/u/Zandr)
#### Post date: [May 9, 2025, 9:17pm UTC](https://community.morsemicro.com/t/halowlink-1-uses-3v3-or-4v3-for-vfem/534/2 "2025-05-09T21:17:19Z")

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There is an option to enable 4.3V VFEM for the HaLow module. It’s pretty deep in the menus, though. Enable Advanced Config, then under Network → Wireless click Edit next to your HaLow network. Under Device Configuration, there is an Advanced Settings tab. Check the box next to 4.3V VFEM.