Dummy Security Cameras can be used to augment your existing security system by creating the impression that you have more camera coverage than is actually installed. They can also be used to temporarily replace faulty cameras in case spares are not available while repairs are being performed. This camera is designed to look like an outdoor brick camera and includes a blinking red LED to indicate camera activity. Requires the use of two AA batteries (not included) for LED activity. Need batteries? Monoprice has ACDelco batteries that are perfect for use in this device! ACDelco AA batteries