Whisper box II white is a ghost box that uses sound banks all forward whispers it also has 2 open banks so you can make your own sounds for a personal ghost box with a control sweep speed to increase or decrease the actual speed of the banks there is a record feature to record your sessions or for evp's and is stored on your device's internal memory under "whisper box 2 mp3 " we here at Viper Paranormal have had much success using this on slower setting with a PORTAL or a powered speaker on our investigations we hope you will love it as much as we do!