1/4"CCD color ceiling camera Pickup Device: 1/4" SHARP CCD Picture Elements：PAL 512(H) x 582(V) NTSC 512(H) x 492(V) Sensing Area: 3.6mm x 2.7mm System of Signal: PAL/NTSC Horizontal Resolution: 420TV Lines Sync signal: INT Sync AGC control: Auto Scanning System: 2:1 Interface ( H ) Frequency: PAL 15.625KHz, NTSC 15.734KHz ( V ) Frequency: PAL 50Hz, NTSC 59.94Hz Lens : 3.6mm/6mm selectable White Balance: Auto tracking white balance Mirror Control: Normal/Reverse Electronic shutter: PAL 1/50～1/100000 (second) NTSC 1/60～1/100000 (second) S/N Ratio: More than 48db Minimum Illumination: 0Lux F1.2 Gamma: 0.45 Video output: 1.0V(p-p)75Ω Power supply: DC 12V Operating current: 120mA+100mA Infrared Lamps: Night (opening)/day(turn off) Size: 90(L)x90(W)x47(H)mm