1/3" SONY CCD, 420/480/500/540TVL 0. ... PAL/NTSC smoke detector camera,hidden camera,smoke sensorspecification:Image sensor: 1.3 inches Sony CCD Horizontal resolution: 420, 480 ... AGC off) Electronic shutter: PAL: 1/50 to 1/100,000 seconds NTSC: 1/60 to 1/100,000 seconds, automaticGamma characteristic: 0 ... Dimensions: 100 x 52mm CCTV hidden smoke camera with 1/3 inch sony ccd sensor and 3.6mm board lens