... mask funciton;Support bothway voice talkback,monitoring;Built-in muti-PTZ protocol, support setup and call of preset, tour and track ... 94.0 mm (TELE), F1.6 to F3.5,Digital zoom 12× (240× with optical zoom),Min. illumination 0.5LuxFCB-H11D10X 1 ... ,f=5.1mm(wide)to50.1mm(tele),F1.8toF2.1,Day / NightApplicable Places:Size Chart: 1.3 Megapixels HD IP IR CCTV Camera(IR Camera)