... 3" or 1/4"sony ccd, 1/3" or 1/4" sharp ccd, 420tvl, 480tvl, 520tvl ir, day/night can be chosen MODEL Image Sensor1/3 ... " Sony Color CCD1/3 ... No.24PCSRanging Distance20-25mInfrared Wavelength850nmSync SystemInternal SynchronizationS/N Ratio>48dBLens 3.6mm/6mmElectronic ShutterPAL: 1/50 -1/100,000 Sec, ...