The Sony SNT-EX101 Full-Function Standalone Encoder (24 VAC) compresses audio and video signals from a single analog surveillance camera into digital data for transmission over the network. The encoder comes with a host of advanced imaging features such as tone correction, dynamic noise reduction, and dynamic frame integration that allow it to record clear images/videos of locations with low-light conditions.This encoder supports H.264, MPEG-4, and JPEG video compression formats that reduce the video file size without compromising on image quality. Furthermore, the dual stream capability of this encoder allows you to view 2 displays simultaneously on the monitor. Compatible PTZ cameras can be controlled via the RS-422 and RS-485 ports. This encoder is powered via a 24 VAC power supply.