Nearly two years ago, Amazon launched Sidewalk, a mesh network built by sharing connections from its Ring and Echo devices. Today, it covers 90% of the U.S., and Amazon is opening it up to everyone.

Amazon Sidewalk works by sharing the internet connection of everyone using an Amazon device. It was designed for devices that use little data. For example, Ring cameras can send notifications even if the owner’s internet connection is down. Now, Amazon is opening up Sidewalk to developers, and the impact could be huge.

“The real advantage for Sidewalk is that Amazon has the experience and clout to make it an industry standard. They have extensive experience running servers and deploying home devices with their Alexa assistant, and this should give them the technical experience and know-how to create a quality network for smart home devices,” Kyle MacDonald, VP at mobile device implementation company Mojio, told Lifewire via email.

If you want a device to have a constant internet connection, you have to either let the user connect it to their wifi network or add a cellular radio that the user has to pay to connect to. That makes sense with a smartphone, but it’s overkill with devices that only need to send or receive a small amount of data.