| Main centres: | 1-3 business days | 
| Regional areas: | 3-4 business days | 
| Remote areas: | 3-5 business days | 
The Hikvision DS-2CD2146G2-ISU is a 4 Megapixel network dome camera with a 2.8mm fixed lens which uses AcuSense to greatly reduce the number of false alarm notifications received, and produces high quality colour images in ultra-low light scenes thanks to Hikvision's Powered by DarkFighter Low Light Technology. It also features a built-in microphone and speaker for real-time 2-way audio security, and an optional interface to add an external speaker.
AcuSense Technology
The most common concerns in perimeter protection are trespassing and vehicle break-ins. AcuSense helps you to focus on these events in two ways:
Users can focus on alarms triggered by humans and vehicles while false alarms triggered by small animals or other irrelevant objects are vastly reduced.

| Camera | |
| Max. Resolution | 2688 × 1520 | 
| Min. Illumination | Color: 0.003 Lux @ (F1.4, AGC ON), B/W: 0 Lux with IR | 
| Shutter Time | 1/3 s to 1/100,000 s | 
| Day & Night | IR cut filter | 
| Image Sensor | 1/3" Progressive Scan CMOS | 
| Angle Adjustment | Pan: 0° to 355°, tilt: 0° to 75°, rotate: 0° to 355° | 
| Lens | |
| Aperture | F1.4 | 
| Lens Type | Fixed focal lens, 2.8 mm | 
| Focal Length & FOV | 2.8 mm, horizontal FOV 103°, vertical FOV 55°, diagonal FOV 123° | 
| Iris Type | Fixed | 
| Lens Mount | M12 | 
| DORI | |
| DORI | 2.8 mm: D: 60.0 m, O: 23.8 m, R: 12.0 m, I: 6.0 m | 
| Illuminator | |
| Supplement Light Type | IR | 
| Supplement Light Range | Up to 30 m | 
| Smart Supplement Light | Yes | 
| IR Wavelength | 850 nm | 
| Video | |
| Main Stream | 50 Hz: 25 fps (2688 × 1520, 1920 × 1080, 1280 × 720) 60 Hz: 30 fps (2688 × 1520, 1920 × 1080, 1280 × 720)  | 
| Sub-Stream | 50 Hz: 25 fps (1280 × 720, 640 × 480, 640 × 360) 60 Hz: 30 fps (1280 × 720, 640 × 480, 640 × 360)  | 
| Third Stream | 50 Hz: 10 fps (1920 × 1080, 1280 × 720, 640 × 480, 640 × 360) 60 Hz: 10 fps (1920 × 1080, 1280 × 720, 640 × 480, 640 × 360) *Third stream is supported under certain settings.  | 
| Video Compression | Main stream: H.265/H.264/H.265+/H.264+ Sub-stream: H.265/H.264/MJPEG Third stream: H.265/H.264 *Third stream is supported under certain settings.  | 
| Video Bit Rate | 32 Kbps to 8 Mbps | 
| H.264 Type | Baseline Profile/Main Profile/High Profile | 
| H.265 Type | Main Profile | 
| Bit Rate Control | CBR/VBR | 
| Scalable Video Coding (SVC) | H.264 and H.265 encoding | 
| Region of Interest (ROI) | 1 fixed region for main stream and sub-stream | 
| Audio | |
| Audio Compression | -S: G.711ulaw/G.711alaw/G.722.1/G.726/MP2L2/PCM/MP3/AAC-LC | 
| Audio Bit Rate | -S: 64 Kbps (G.711ulaw/G.711alaw)/16 Kbps (G.722.1)/16 Kbps (G.726)/32 to 192 Kbps (MP2L2)/8 to 320 Kbps (MP3)/16 to 64 Kbps (AAC-LC) | 
| Audio Sampling Rate | -S: 8 kHz/16 kHz/32 kHz/44.1 kHz/48 kHz | 
| Environment Noise Filtering | -S: Yes | 
| Network | |
| Protocols | TCP/IP, ICMP, HTTP, HTTPS, FTP, DHCP, DNS, DDNS, RTP, RTSP, NTP, UPnP, SMTP, IGMP, 802.1X, QoS, IPv4, IPv6, UDP, Bonjour, SSL/TLS, PPPoE, SNMP, ARP, WebSocket, WebSockets | 
| Simultaneous Live View | Up to 6 channels | 
| API | Open Network Video Interface (PROFILE S, PROFILE G, PROFILE T), ISAPI, SDK | 
| User/Host | Up to 32 users. 3 user levels: administrator, operator and user | 
| Security | Password protection, complicated password, HTTPS encryption, IP address filter, Security Audit Log, basic and digest authentication for HTTP/HTTPS, TLS 1.1/1.2, WSSE and digest authentication for Open Network Video Interface | 
| Network Storage | NAS (NFS, SMB/CIFS), auto network replenishment (ANR) Together with high-end Hikvision memory card, memory card encryption and health detection are supported.  | 
| Client | iVMS-4200, Hik-Connect, Hik-Central | 
| Web Browser | Plug-in required live view: IE 10, IE 11 Plug-in free live view: Chrome 57.0+, Firefox 52.0+, Edge 89+ Local service: Chrome 57.0+, Firefox 52.0+, Edge 89+  | 
| Image | |
| Image Parameters Switch | Yes | 
| Image Settings | Rotate mode, saturation, brightness, contrast, sharpness, gain, white balance adjustable by client software or web browser | 
| Day/Night Switch | Day, Night, Auto, Schedule | 
| Wide Dynamic Range (WDR) | 120 dB | 
| SNR | 52 dB | 
| Image Enhancement | BLC, HLC, 3D DNR | 
| Interface | |
| Ethernet Interface | 1 RJ45 10 M/100 M self-adaptive Ethernet port | 
| On-Board Storage | Built-in memory card slot, support microSD/SDHC/SDXC card, up to 512 GB | 
| Built-in Microphone | -U: Yes | 
| Audio | -S: 1 input (line in), two-core terminal block, max. input amplitude: 3.3 Vpp, input impedance: 4.7 K, interface type: non-equilibrium; 1 output (line out), two-core terminal block, max. output amplitude: 3.3 Vpp, output impedance: 100 , interface type: non-equilibrium  | 
| Alarm | -S: 1 input, 1 output (max. 12 VDC, 30 ... |