High Die-cast Aluminum construction, &©|61548; 4.5-inch, Low noise design &©|61548; 360¡ã Continuously rotation, rotation rate 360¡ã/s. &©|61548; OSD function &©|61548; 128 preset positions,60 seconds self studying function per track,total 4 tracks &©|61548; Multi-protocol baud rate for option &©|61548; Image sensor 1/4" CCD &©|61548; Active pixels 752H¡Á582V &©|61548; Resolution 480TVL &©|61548; Min. illumination 0.7LUX &©|61548; S/N Ratio ©ƒ50dB &©|61548; Electronic shutter 1/50~1/120,000s &©|61548; Scanning frequency 15.625KHz(H) 50Hz &©|61548; White balance AUTO &©|61548; AGC AUTO &©|61548; Video output 1.0Vp-p at 75ohm &©|61548; Zoom 10X |