Ds-2de2c400mw-de(s7) 4 mp powered-by-darkfighter network speed dome high quality imaging with 4 mp resolution clear imaging against strong back light due to dwdr technology 3d dnr technology delivers clean and sharp images hik-connect cloud service and app for remote management and views of devices built-in microphone for real-time audio security built-in memory card slot, support microsd/sdhc/sdxc card, up to 256 gb water and dust resistant ip66 specification camera image sensor 1/3′′ progressive scan cmos max. resolution 2560 x 1440 min. illumination color: 0.005 lux @(f1.2,agc on), b/w: 0 lux with ir lens focal length 2.8 mm/ 4 mm fov 2.8 mm, horizontal fov 97°, vertical fov 52.3°, diagonal fov 114.3° 4 mm, horizontal fov 79°, vertical fov 42.4°, diagonal fov 93.3°