Specifications: Model GD-D1821/GD-D2821 GD-D122/GD-D222 GD-D121/GD-D221 GD-D121S/GD-D221S Pickup Device 1/3 ＂CCD Sony 1/4＂ CCD Sony 1/4＂ CCD Sharp Horizontal Resolution 480TVL 420TVL Scanning System PAL/NTSC System of Signal PAL:752(H) *582(V) NTSC:768(H)*494(V) PAL:500(H) *582(V) NTSC:510(H)*492(V) Minium Illumination 0.1Lux/F1.2 Backlight compensation Auto/ Manual Shutte Speed 1/50(1/60)Sec~1/100,000sec S/N Ratio >52db >48db IN Lens Auto or Manual White Balance Auto/ Manual Automatic aperture Auto/ Manual Sync System Internal Video Input 1.0VP～P75Ω Video Ouput BNC Power Source DC12V/＜100mA(?0%) Operation Temperature ?0癈~＋55癈 Gar.M ＞0.45 Dimension 66?5?18 65?0?0 Weight 350g 310g