VIVOTEK's SD7151, equipped with an 18x optical zoom lens, is a high performance day/night speed dome network camera suitable for professional surveillance applications. It represents another significant addition to VIVOTEK's high-end, progressive-scan network camera portfolio. Complementing the Sony 18x optical zoom lens is the progressive CCD sensor, allowing for not only for exceptional detail on enlarged images taken from faraway distances, but also crystal-clear, razor-sharp images of fast-moving objects without jagged edges. With its sophisticated pan/tilt mechanism, this camera provides fast, precise movement with continuous 360-degree pan and 90-degree tilt. You can easily control the lens position via mouse or joystick to track the object you are interested in and define up to 128 presets for patrolling. The day and night functionality makes this camera ideal for operating under diverse lighting conditions. When light conditions turn poor, the IR cut filter will be automatically removed to accept IR illumination. At the same time, the camera switches itself automatically from color to black and white, ensuring optimal image quality at all times. Additional advanced features including 3GPP mobile surveillance, two-way audio by SIP protocol, and digital I/O for external sensors and alarms make the VIVOTEK SD7151 a truly full-featured speed dome. It is the best solution for various enterprise projects such as airports, highways, parking lots, and shopping malls, where high-level reliability and precision is an absolute requirement.