it's a little button you physically attach to your.. laundry machine

poke to order package.

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https://smile.amazon.com/Amazon-JK29LP-Bounty-Dash-Button/dp/B0187TMPA8/

Amazon Dash Button is a Wi-Fi connected device that reorders your favorite product with the press of a button. Each Dash Button is paired with a product of your choice, which is selected through the Amazon App on your Android or iOS smartphone during the set-up process.

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