This IR shadow and motion detector has an intriguing coffin design and will alert you by its music box playing a creepy tune for about 10 seconds. How Does It Work? The Passive Infared (PIR) eye sensor detects shadow and movement up to approximately 8 feet = 2.5 meters. How To Use Insert 3 AA alkaline name brand batteries. Power on by switching the switch on the side and the light next to the switch indicates that the power is sufficient. The melody will play. Wait for 20-40 seconds so the device warms up and gets calibrated. Place the coffin upright facing the direction to be monitored. Every time it detects movement and plays its tune, it will take about 4 seconds for it to reset. Features Length: 6" = 15.2 cm , Width: 3.4" =8.57 cm wide , Depth 2.5" = 6.3 cm Power: 3 AA alkaline name brand batteries (not included) Audible alert = a creepy tune from the built in music box Range = Approximately 8 feet = 2.5 m
