ACM-8511 IP PTZ Camera : Main Features 1/4 inch CCD Image Sensor Day and night function Optical zoom ratio 10X 0.009 Lux at F1.8 (5600° K, 50 IRE, Max. AGC, Max. Sense Up) Backlight Compensation, Auto Iris Control, Auto White Balance Supported Selectable MPEG-4 / MJPEG compression CIF up to Full D1 resolution at 30/25 FPS Multi-stream with variable frame rate in the same compression Two-way audio supported Hardware motion detection, Digital Input/Output