Yes, I must confess... I love my "ghost box" which is the P-SB7 version. It is the size of a small radio. You can use it as a radio or you can use it as a ghost box. You push a button and the radio can scan the channels forward or reverse in AM or FM.
You set up a voice recorder (prefer digital) to record your session. I was quite skeptical about this box until I tried it myself. I sat outside my doctor's office in August, next to a pond. It is a place that I had gotten some EVPS a few month's before. I was curious what would happen since I know there are spirits in this place.