The Trip Sensors are an easy to use movement detector and great to have in your Ghost Hunting equipment box.
It creates an invisible infra-red beam between the two units up to 20 metres apart and if that beam is interrupted, an alarm will sound. With three volume level settings and alarm tones, it's an easy to install, battery operated device that is ideal for hallways and doorways to hear if anything is walking through and breaking the beam.
I have bought a few things from John and always found him friendly and helpful! My go to man for any paranormal instruments. Nothing is too much trouble. Thanks John and Emma. Xx