This is the must have SB7T SPIRIT BOX for EVP Ghost Hunting. The SB7T is the most popular instrument for EVP research. The P-SB7T is the 6th and latest SB7 Spirit Box version. This legendary device has given ample proof that it can instantly transmit unexplained voices. These voices, referred to as EVPs (Electronic Voice Phenomena), typically express intelligence since they often call out things that identifies people present at the investigation or something that pertains to the investigation. Also, communications coming across typically co-relates to the known facts about that haunted site, such as specifics about the spirits there. The P-SB7 is the most famous tool for instant spirit communications since it has been the favorite on numerous Paranormal TV-Shows. The P-SB7 works by scanning the FM band and AM band along with a unique high frequency synthetic noise, a.k.a. white noise, where spirit voices seemingly are able to form words. The P-SB brand's FM band scans 320 FM frequencies, which is further than any other competing brand known on the market, from 76 MHz to 108 MHz. Also, unique for the P-SB brand is that the band sweep speed can be selected. One can choose from 7 different millisecond sweep speeds. One can also sweep forward or backwards. Improvements, other than the added FM frequencies, from earlier versions of the P-SB7 are many. Improved from the Rev 5 is that there is no Audio Alert for Temp Changes. It would interfer with EVP sessions and you would have to recalibrate the SB7T Rev 5 and start over when the alert went off. Now the screen shows the Temp Changes instead. You can toggle the screen between Ambient Temp or showing the Temp Changes in 0.1F or C along with Scanning Speed and Band Frequency. And there is no longer need to stop the scanning to change the volume. The built in speaker is better - louder and with improved tremble.