The camera's built-in sensor is a pyroelectric infrared sensor, which means it uses infrared rays to detect temperature differences within its range that are emitted naturally by people, animals, etc. The sensor can be used to trigger the camera to buffer (i.e., temporarily store) camera images in its memory. You can view these images later as desired. The sensor can also be used to trigger the camera to transfer images to someone or somewhere, by FTP, E-mail, or HTTP. Privacy mode allows you to protect your privacy by hiding the lens inside the camera, preventing camera images from being seen. If users are accessing the camera when privacy mode is turned on, the camera image area displayed in their web browsers turns gray. No camera pages can be accessed by users while privacy mode is turned on. Once privacy mode is turned off, users can press the refresh button in their web browsers to view images again. Built-in Microphone