This professional surveillance equipment has a miniature camera hidden inside a non functional smoke alarm with a built-in transmitter. The wide angle lens allows the largest view of the target area. With the newest innovation and technology, a remote control switch optional can be added to this model. This allows you to turn the camera on and off up to 150' away. The camera is very easy to operate and no installation is required, just plug and play. This model is conveniently portable.