As of June 8, Amazon will turn on what it calls Amazon Sidewalk—a wireless network of Amazon devices like Echo units and Ring cameras that use their owners’ bandwidth to help other Amazon devices send small bits of data to the internet.

Since recent Amazon devices will automatically join the network if you don’t opt out, you should do so by Tuesday if you don’t want to participate. The network will allow Amazon devices to reconnect themselves more quickly if they lose a Wi-Fi connection and will let the company’s Tile property trackers continue to update their locations and Ring cameras continue to send motion alerts if they lose connections to their normal Wi-Fi routers, according to the company. That will likely help Tile compete with Apple’s AirTag property trackers, which can use other people’s iPhones to transmit their locations if the items they’re attached to are lost.

Additional devices will likely come to use the Sidewalk network in the future, with Amazon publishing information for third-party manufacturers looking to connect to the network.

Amazon says the network is privacy-protected and that it will use a maximum of 500 megabytes of data per month, at a rate of no more than 80 kilobits per second—a small fraction of the bandwidth required to, say, stream high-definition video. But, The Guardian reports, some experts have warned the network could potentially violate internet providers’ terms of use. And some users may simply have privacy concerns, despite Amazon’s assurances, or just object to a multibillion-dollar corporation building a network by piggybacking on the internet connections its customers pay for.

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