We have all used doorbells to get into houses and buildings, but what if your dog could use them too?
An inventor in Eugene, Oregon has made it possible.
Pebble is and old dog that is learning new tricks. His owner Keith Jin invented a doggy doorbell, after Pebble started scratching and ruining doors around his home every time he wanted to be let out.
After about a year of testing, he came up with a portable, mountable doorbell, that can be used inside and outside the house. Jin said the doggy doorbell has been so successful, they're looking to expand.
The Pebble Smart Doggy Doorbell costs around $30, which includes two doorbells and two receivers. For more information head to http://www.indiegogo.com/pebblesmart