Type Fixed Dome/HDTV/Megapixel/Outdoor , Video interface HDCVI , Sensor size 1/2" , Focal Length 2.5mm , Min. Illumination 0.01 Lux , Effective pixels 3840(H)×2160(V) , Electronic Shutter Speed PAL:1/4s~1/100,000s, NTSC:1/3s~1/100,000s , Microphone Built-in , 2xAlarm In , 1xAlarm Out , Power supply requirements 12 VDC , Dimensions Φ149.8 x 47.7mm