Vivotek PZ7111/PZ7121 is a high-performance network camera featuring 10x optical zoom and pan/tilt functionality. The camera is designed for indoor surveillance applications such as retail stores, offices or banks. The built-in 10x motorized optical zoom module provides greater depth of field when zoomed in. Therefore, it can display clear-cut images on near or distant objects. With flexible 300-degree pan and 135-degree tilt, the camera can give users more comprehensive control over the monitored site. It is incorporated with the companys self-developed Bach Soc, giving users the advantages of dual-codec (MPEG-4 and MJPEG), dual streams and two-way audio by SIP protocol. With support of dual streams, it simultaneously delivers dual video streams with different resolutions, frame size and image quality to different platforms such as web browser or 3G cell phones.