The Verge reports: [edited]
It’s 2am and you’re changing your baby when you realise you’ve just used up your last nappy. Or you go to reach under your sink to grab another roll of toilet paper only to discover you've forgotten to order more...
The Dash button is a WiFi-enabled button that will instantly order a product within seconds of pressing it. An LED on the front blinks after you press it, then turns green to let you know Amazon has received the order. You will have provided Amazon with your payment information, along with the size and quantity you require. The product will be shipped to your pre-determined delivery address.
Dash buttons come with an adhesive strip on the back, and a small bumper case that allows it to be hung up on hooks or on strings.