HTZ-2700IC (Day/Night) Indoor High Speed Dome Cameras With IR Filter 27X 1/4″ SONY EXview CCD Resolution 540TVL Zoom: 27X Optical; 12X Digital F1.6~2.9, f=3.5(Wide)~94.5 (Tele) mm Min illuminance: 0.4 Lux (Day): 0.02 Lux (Night) communication: RS485 Protocol: Peloc-D, Pelco-P Selectable Vandal Resistance Built-in Fan and Heater Power: AC 24V / 1.5A