An EVP (Electronic Voice Phenomenon) is a voice recorder that can capture sounds not heard by your own ear. Spirits can communicate with you via this technology.
EMF is Electromagnetic Field. This is a way for otherworldly to communicate with us by using EMF waves.
Infrared or IR as it's commonly known, is a night vision lighting that projects red lighting to help camera's or camcorders see in the dark.
The Ouija Board or also known as a Spirit Board, is a very dangerous piece of equipment used by only professional investigators.
The Ovilus device is used to communicate with the spirits / Ghosts through waves of energy helping them talk words to you through the device.