Exx. As an IT pro, I was looking for something small so I wouldn't have to lug around a large $600 device in a small tool bag. Unfortunately, there were errors in this sound/test device. I plug it into a phone or data system and sometimes it works, other times it shuts down completely or becomes unresponsive until I unplug it. I also wish it had a dedicated phone jack and a coax connector instead of a BNC security camera tester.