So I've only found one thread about the GoTennas and it was before the mesh network was out. I'm at least a bit surprised that i haven't seen anything about this product on here. I purchased the 4 pack while there was a sale on and i'm not disappointed. If you have never heard of these, check them out. Here's a link to their website,
https://gotennamesh.com/products/mesh A quick (very non technical what's what) is that these devices connect to your smart phone and then can "text" to each-other and even bounce or piggyback off any other ones around to get your message where its going. No need for internet or cell service.
I work in emergency services and my team uses mine sometimes when we are deployed to disasters. They're not perfect by any means but its a nice back up to our backup.
