MODEL NO. TX-326G TX-326A TX-326B TX-326C TX-326D Pickup device 1/3 Sony CCD color 1/4 Sharp CCD color 1/4 Sony CCD color 1/3 Sharp CCD color Sync.system Internal Horizontal resolution 520TVL 420TVL Minimum illumination 0.8Lux 0 .5Lux number of pixels PAL:752H×582V NTSC:768H×494V PAL:512H×582V NTSC:512H×492V PAL:500H×582V NTSC:510H×492V PAL:512H×582V NTSC:512H×492V PAL:500H×582V NTSC:510H×492V System of signal PAL/NTSC Video output 1.0vp-p/75 Ω IR view Distance 20M IR LEDs 23pcs S/N ratio ≥48dB (AGC off) AGC auto Backlight compensation auto Gamma correction >0.45 Rotation range  Pan: 0 to 355°, 20°/secondso    Tilt: 0 to 90°, 30°/seconds Power supply 12V DC  1000MA Lens mount 4-9MM lens with manual adjustment Operation temperature -10°C~+50°C RH95%MAX Dimension  φ165*170