The ParaForce Spirit Vibes is exclusively designed for paranormal investigations. It picks up vibrations and the slightest movement of the device will trigger the LED lights. The detection is done by 3 different colored LED lights and three axes. The Spirit Vibes also has buzzer that can be disengaged and two colored LED indicates whether the buzzer is on or off. 9V batteries (not included). Great workmanship – made in EU.