Customers will get a notification the morning of a delivery, with a window of time when they should expect Amazon to arrive.

They will get another notification when the delivery van shows up.

Prime customers can get same-day delivery, and drop off with an hour or two on some items.

The courier then gets a prompt on their app, swipes the screen, and , your door unlocks.

They drop off the package, relock the door with another swipe, and are on their way.

That’s meant to let people inside know someone is entering, and also give the delivery person a chance to check for potential hazards like angry dogs.

Couriers are instructed to open the door as little as possible, slide the packages in, and not enter the home if possible.

So Amazon Key is only available in 37 cities across the US where Amazon Logistics handles the drop-off.

But the company says it hopes to expand the service more widely in the future.The customer will get a notification that their delivery has arrived, along with a short video showing the drop-off to confirm everything was done properly.The system works with locks from Yale and Kwikset, two well-known brands.But the other piece, the connected camera, is made by Amazon, and that’s a really big deal.Amazon is pushing even further into the smart home space, a market it’s made big strides in, thanks to the huge popularity of its Alexa devices.Twelve years ago, Amazon launched Prime, a subscription service that entitled members to free two-day shipping in the United States.