Model IR4511   Signal System NTSC   Scanning System 2:1 Interlace   Sync. System Internal   Image Sensor 1/3 Inch Sony Super HAD CCD   Total / Effective Pixels 768 (H) x 494 (V), 380K   Horizontal Resolution 540 TV Lines   Lens 3.6mm Fixed Board Lens   Video Output 1.0Vp-p, 75 Ohms, Composite   S/N Ratio More Than 48dB   Min. Illumination Day (0.5 Lux), IR LED On (0.0 Lux)   Shutter Speed 1/60~1-100,000 Sec.   IR LED & Sensor 12EA IR LED, 1EA Sensor   White Balance Auto   AGC Built-in   BLC Built-in   Supplied Voltage DC12V   Power 500mA Recommended   Dimensions 4" Diameter