"The app on your phone alert you that you've had a package delivered," said Grabham.
If the package is lifted or moved before the app is disarmed, an extremely loud shrill alarm sounds until the person using the app deactivates it.
"It's really loud it's about 100 decibels, so your neighbors are also alerted," he said.
Grabham's vision is for thieves (he calls them "Porch Pirates") to regard the device as a very loud deterrent.
"If the thieves keep moving, when they see this, we win," he said."
Grabham says he can also envision a day when his product will work with Amazon's drone package deliveries of the future.
"We're already working on that," he said.