The DCIA deters robbery and shoplifting without the high cost of a real surveillance camera. Features a built in motion detector. It will remain still until someone passes by then the camera will move back and forth and a red light will flash a alarm will sound and several pre-recorded verbal warnings are broadcast (verbal warnings are pre-recorded and cannot be changed). This camera can be mounted to either the wall or ceiling. Operates on three AA batteries (not included). The camera measures 5 inches x 2 inches x 2 inches (excluding the mounting bracket). The verbal warnings include Intruder Alert and Leave the room immediately and Make no sudden movements and Please touch nothing and Vacate immediately.The DCIA deters robbery and shoplifting without the high cost of a real surveillance camera. Features a built in motion detector. It will remain still until someone passes by then the camera will move back and forth and a red light will flash a alarm will sound and several pre-recorded verbal warnings are broadcast (verbal warnings are pre-recorded and cannot be changed). This camera can be mounted to either the wall or ceiling. Operates on three AA batteries (not included). The camera measures 5 inches x 2 inches x 2 inches (excluding the mounting bracket). The verbal warnings include Intruder Alert and Leave the room immediately and Make no sudden movements and Please touch nothing and Vacate immediately.