| Image Sensor | : 1/2.8″ progressive scan CMOS | 
| Min. Illumination | : Color: 0.01 Lux @(F1.2, AGC ON), 0.028Lux @ (F2.0, AGC ON) | 
| Shutter Speed | : 1/3 s to 1/100, 000 s | 
| Slow Shutter | : Yes | 
| Auto-Iris | : No | 
| Day & Night | : IR cut filter | 
| Digital Noise Reduction | : 3D DNR | 
| WDR | : DWDR | 
| Angle Adjustment | : Pan: 0° to 355°, tilt: 0° to 70°, rotate: 0° to 355° | 
| Lens |  | 
| Focal length | : 2.8 mm, 4 mm, 6mm | 
| Aperture | : F2.0 | 
| Focus | : Fixed | 
| FOV | : 2.8 mm, horizontal FOV 114.8°, vertical FOV 62°, diagonal FOV 135.5° : 4 mm, horizontal FOV 86°, vertical FOV 46.5°, diagonal FOV 102.5°
 : 6 mm, horizontal FOV: 54°, vertical FOV: 30°, diagonal FOV: 62°
 | 
| Lens Mount | : M12 | 
| IR |  | 
| IR Range | : Up to 40 m | 
| Wavelength | : 850 nm | 
| Compression Standard |  | 
| Video Compression | : Main stream: H.265/H.264 : Sub stream: H.265/H.264/MJPEG
 : Third stream: H.265/H.264
 | 
| H.264 Type | : Main Profile/High Profile/Baseline Profile | 
| H.265 Type | : Main Profile | 
| Video Bit Rate | : 32 Kbps to 8 Mbps | 
| Smart Feature-set |  | 
| Behavior Analysis | : Line crossing detection, intrusion detection | 
| Region of Interest | : 1 fixed region for main stream | 
| Image |  | 
| Max. Resolution | : 1920 × 1080 | 
| Main Stream |  | 
| Max. Frame Rate | : 50Hz: 25fps (1920 × 1080, 1280 × 960, 1280 × 720) : 60Hz: 30fps (1920 × 1080, 1280 × 960, 1280 × 720)
 | 
| Sub-stream |  | 
| Max. Frame Rate | : 50Hz: 25fps (640 × 480, 640 × 360, 320 × 240) : 60Hz: 30fps (640 × 480, 640 × 360, 320 × 240)
 | 
| Third Stream |  | 
| Max. Frame Rate | : 50Hz: 1fps (352 x 240, 320 x 240) : 60Hz: 1fps (352 x 240, 320 x 240)
 | 
| Image Enhancement | : BLC, 3D DNR, HLC | 
| Image Setting | : Saturation, brightness, contrast, sharpness, AGC, white balance adjustable by client software or web browser | 
| Day/Night Switch | : Auto, scheduled, day, night | 
| Network |  | 
| Alarm Trigger | : Motion detection, video tampering alarm, illegal login | 
| Specification |  | 
| Available Model | : DS-2CD3121G0-I (2.8/4/6 mm) | 
| Protocols | : TCP/IP, ICMP, HTTP, HTTPS, DHCP, DNS, RTP, RTSP, RTCP, NTP, IGMP, QoS, UDP | 
| General Function | : Anti-flicker, heartbeat, mirror, password protection, privacy mask, watermark | 
| Firmware Version | : V5.5.70 | 
| API | : ONVIF (PROFILE S), ISAPI | 
| Simultaneous Live View | : Up to 6 channels | 
| User/Host | : Up to 32 users : 3 levels: Administrator, Operator, and User
 | 
| Client | : iVMS-4200, Hik-Connect, iVMS-5200, iVMS-4500 | 
| Web Browser | : IE8+, Chrome 31.0-44, Firefox 30.0-51, Safari 8.0+ | 
| Interface |  | 
| Communication Interface | : 1 RJ45 10M/100M self-adaptive Ethernet port | 
| General |  | 
| Operating Conditions | : -30 °C to 60 °C (-22 °F to 140 °F), humidity: 95% or less (non-condensing) | 
| Power Supply | : 12 VDC ± 25%, 5.5 mm coaxial power plug : PoE (802.3af, class 3)
 | 
| Power Consumption and Current | : 12 VDC, 0.4 A, Max: 5 W : PoE: (802.3af, 36 V to 57 V), 0.2 A to 0.1 A, Max: 6.5 W
 | 
| Ingress Protection | : IP67, IK10 | 
| Material | : Front cover: plastic, back cover & bracket: metal | 
| Dimensions | : Camera: Ø 111 mm × 82.4 mm (4.4″ × 3.2″) : With package: 134 mm × 134 mm × 108 mm (5.3″ × 5.3″ × 4.3″)
 | 
| Weight | : Camera: Approx. 400 g (0.9 lb.) : With package: Approx. 600 g (1.3 lb.)
 | 
 
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