HTZ-3700CBH 37x Optical Day/Night w/ corner mount PTZ Cameras 1/4″ SONY EXview CCD Resolution: 540TVL Zoom: 37X Optial; 12X Digital Focal Length: F1.6 ~ 3.9, f=3.5 (Wide) ~ 129.5mm (Tele) Min Illuminance: 1.0 Lux (Day); 0.01 Lux (Night) Communication: RS485 Protocol: Pelco-D, Pelco-P Selectable Vandal Resistance, weather resistance Built-in Fan and Heater Corner Mount Bracket Power: AC24V / 1.5A