... 3)520TVL,COLOR1/3"sonyLow lux CCD SAV-CD169 Waterproof PTZ Camera SONY490 core 1/4Super HAD CCD 540TVL 18X optical zoom ... , double deck ventilate hole constant temperature design, IP66 weatherproof rating.• Intelligent speed shift, 0.5°/S-280°/S smooth pan shift ... second preset stick time.• Color 18X, 22X, 27 X optics camera module.• Proportional zooming, reduce pan/tile speed according to zooming ...