Eero's new backup device keeps you online when your ISP fails - here's how it works
Eero Signal connects to compatible Eero routers and automatically switches to LTE backup during internet outages; costs $100 and requires an Eero Plus subscription.
Eero's Signal is a cellular safety net for your Wi-Fi network
Eero Signal automatically switches an entire Wi‑Fi network to a cellular backup, but requires the Eero ecosystem and a paid subscription with limited yearly backup data.