Cell phone service on a landline??

Am I the only one who didn't know that there's a way to talk on your cell # through a regular landline handset?! How cool is that?? I'm still not sure HOW it works (Bluetooth, I think?) but I had no idea until I saw this VTech giveaway at MommyPR that such a thing existed. Of course, I had to enter.

Now I just have to be patient to see if I win ~crossing fingers~ and resist buying it until after the giveaway ends!