› M1 Support Forum › Honeywell 5800CO This topic has 1 reply, 2 voices, and was last updated July 3, 2023 at 10:01 am by Brad Weeks. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts July 3, 2023 at 8:57 am #7113 Paul Smith I’ve read where the Honeywell5800Combo is not supported with Elk M1 and M1XRF2Hv2. What about the Honeywell5800CO which is just the Carbon Monoxide detector? Is it supported. Thanks July 3, 2023 at 10:01 am #7115 Brad Weeks The Honeywell 5800COMBO unit is NOT compatible with the ELK M1 System but the Honeywell 5800CO and the 5808WS should work. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In