product name Smoke Detector type VCA-872D manufacturer vcam physics parameter Image Sensor: 1/4" Sharp CCD Signal System: PAL/NTSC Pixels: PAL:500 (H)X582(V) NTSC:510(H)X492(V) Resolution: 420 TV Lines Lens: 3.6/6/8mm lens Shutter Speed:1/50(1/60)?/100,000(s) S/N Ratio More than 48 dB White Balance: Auto White Balance Minimum Illumination: 0.8 LUX Video Output: BNC, 1.0Vp-p 75Ω Power Supply: DC 12 V/1A Operating Temperature: -10℃~50℃ Dimension/Weight: Φ110mm X50mm/0.15kg Case/Color: Plastic/White function tach information Package Box:57.0X29.5X30 cm, 32 pieces/box