The Magic Jack is a USB device that you can plug a phone line into to make phone calls from your home over the internet. I have been excited about ordering.You can make calls with Magic Jack using your computer microphone and speakers or headset. I wish I had plugged Magic Jack into my laptop earlier and I would have saved myself $20 by not buying a phone. My computer headset works just fine.I have been using a VOIP or voice over ip based phone for some time. I originally ordered my own phone number with Skype to replace my home phone.