VIVOTEK Network Camera MJPEG and MPEG-4 Video Compression Built-in IR LEDs for Night Vision Integrated Two-way Audio Vandal-proof and Weather-proof (IP66) Part number VI55FD6111V VIVOTEK 3-Axis Fixed Dome Network Camera 3-axis Mechanical Design Wide Angle Vari-focal Board Lens Built-in PIR Sensor for Motion Detection Built-in White Light LEDs Part number VI55FD7131 VIVOTEK Network Camera MJPEG and MPEG-4 Video Compression Motorized Pan/Tilt/Zoom 10X Optical Zoom and 10X Digital Zoom Integrated Two-way Audio Part number VI55PZ6112 MUL-T-LOCK Padlock   MUL-T-LOCK Cylinder   MUL-T-LOCK Intelligent Key