The VIVOTEK FD6111V/FD6121V is a powerful network camera with many advanced features. Built-in the dual-codec, MPEG-4/M-JPEG compression engine, users of FD6111V/FD6121V can freely select to adopt either compression mode. Incorporating a high resolution 1/3 inch Sony CCD sensor, the removable IR cut filter and IR LEDs enables the camera perfectly to be used for 24-hour surveillance. Its vandal-proof and weather-proof body has no problem for both the indoor and outdoor installation. The new 2-way audio function let the users not only listen but also talk to the camera site. All the state-of-the-art features make the VIVOTEK FD6111V/FD6121V suitable for various surveillance applications. MJPEG and MPEG-4 Video Compression Selectable Built-in IR LEDs for Night Vision Integrated Two-way Audio Vandal-proof and Weather-proof (IP66) High Resolution 1/3" SONY CCD Sensor Vari-focal Auto Iris 3.6~9.0mm Lens Removable IR Cut Filter Optimized Synchronization of Audio and Video Intelligent Motion Detection Pre- and Post- Alarm Snapshots Digital I/O for Sensor and Alarm.