This is one of those things that makes you mad that it didn’t exist until now, and that you’re not the one who came up with it: UberGizmo has the details of a MP3 doorbell. Seriously. It allows you to load any song to the SD card in the speaker, and then put the button outside your door. It has a 165-foot range, so it even works if you have a giant house you want to put “Knocking On Heaven’s Door” as your doorbell.
Because it would be kind of ridiculous to just have it be a doorbell, it’s also a portable music player. It’ll be available for $49.99 soon. Learn more over here.