DS-2CD20123G2-LIUY/SRB - is a 12 MP bullet IP camera with a 2.8 mm F1.6 fixed lens and a 94.2° horizontal field of view, ideal for high-definition video surveillance. It integrates AcuSense with people and vehicle classification via Deep Learning , Smart Hybrid Light with IR and white light up to 40 m and 120 dB WDR . The /SRB model features a red and blue strobe light and active acoustic warning for immediate deterrence. It supports Face Capture , H.265+ compression, audio with integrated microphone and speaker, IEEE 802.3at PoE , microSD up to 512 GB and IP67 protection with NEMA 4X . Hikvision
DS-2CD20123G2-LIUY/SRB – 12MP 2.8mm FIXED LENS BULLET CAMERA - ARTIFICIAL INTELLIGENCE - STROBE LIGHT - SMART HYBRID LIGHT

The Hikvision DS-2CD20123G2-LIUY/SRB is a 12 MP bullet IP camera with a 2.8 mm F1.6 fixed lens and a 94.2° horizontal field of view, ideal for high-definition UHD video surveillance. It integrates AcuSense with intelligent person and vehicle classification, Smart Hybrid Light with IR and white light up to 40 m and 120 dB WDR for clear images even in backlit situations. The /SRB model features a red and blue strobe light and an acoustic warning for active deterrence. It also supports Face Capture , audio with integrated microphone and speaker, H.265+ compression, PoE IEEE 802.3at , microSD up to 512 GB and IP67 protection with NEMA 4X .
Main features:
- Resolution: 12 MP
- Lens: 2.8mm F1.6
- AcuSense: People and Vehicles
- Smart Hybrid Light: up to 40 m
- Alarm: red/blue light + audio
- Audio: microphone + speaker
- Face Capture: Supported
- PoE: IEEE 802.3at
- Protection: IP67, NEMA 4X
Further details
2.8mm fixed lens with F1.6 aperture and 94.2° horizontal, 51.1° vertical and 110.2° diagonal field of view , ideal for obtaining wide coverage of the video surveillance area with a high level of detail.
1/1.8" Progressive Scan CMOS sensor with a maximum resolution of 12 MP (4608 × 2592 pixels) at up to 20 fps, designed to capture high-definition , detail-rich UHD images.
It integrates Artificial Intelligence algorithms based on Deep Learning for the intelligent classification of people and vehicles , improving the detection accuracy and management of security events.
It combines IR illumination and white light with 3 supplementary lighting modes and a range of up to 40 meters , adapting the illumination to different night-time video surveillance conditions.
Hikvision AcuSense technology leverages deep learning-based person/vehicle classification to make security events more targeted and reduce alarms generated by irrelevant targets.
It supports intelligent Face Capture function, allowing the camera to capture faces detected within the monitored scene.
It integrates a single microphone with ambient noise filtering and a 2W speaker with sound pressure up to 110 dB at 10 cm , offering integrated audio functions for monitoring and deterrence.
The /SRB model integrates red and blue strobe light and active audible alarm , combining visual and audible warnings to increase the effectiveness of deterrence in the event of an event.
It offers Deep Learning perimeter protection with line crossing, intrusion, area entry and exit detection, supporting alarm triggering based on person and vehicle targets.
It supports IEEE 802.3at Class 4 PoE power supply with a maximum power consumption of 19W , allowing power and data to be transmitted through a single Ethernet cable and simplifying cabling.
It has 10/100 Mbps Ethernet RJ45 port, supports ONVIF Profile S/G/T , IPv4/IPv6, HTTPS, RTSP, NAS and ANR, up to 6 simultaneous Live Views and is compatible with Hik-Connect, iVMS-4200 and Hik-Central .
Technical data sheet
| DS-2CD20123G2-LIUY/SRB | |
| Room | |
| Image Sensor | 1/1.8" Progressive Scan CMOS |
| Max. Resolution | 4608 × 2592 |
| Min. Illumination | Color: 0.005 Lux @ (F1.6, AGC ON),0 Lux with light |
| Shutter Time | 1/3 s to 1/100,000 s |
| Day & Night | IR cut filter |
| Angle Adjustment | Pan: 0° to 360°,tilt: 0° to 90°,rotate: 0° to 360° |
| Lens | |
| Lens Type | Fixed focal lens, 2.8 mm |
| Focal Length & FOV | horizontal FOV 94.2°, vertical FOV 51.1°, diagonal FOV 110.2° |
| Lens Mount | M16 |
| Iris Type | Fixed |
| Openings | F1.6 |
| Depth of Field | 2.9 m to ∞ |
| Illuminator | |
| Supplement Light Type | White Light, IR |
| Supplement Light Range | Up to 40 m |
| Smart Supplement Light | Yes |
| IR Wavelength | 850mm |
| Video | |
| Main Stream | 50 Hz: 20 fps (4608 × 2592) 25 fps (3840 × 2160, 2688 × 1520, 1920 × 1080, 1280 × 720) 60 Hz: 20 fps (4608 × 2592) 30 fps (3840 × 2160, 2688 × 1520, 1920 × 1080, 1280 × 720) |
| Sub-Stream |
50Hz: 25fps (1280×720, 640×480, 640×360) |
| Third Stream |
50Hz: 10fps (1920×1080, 1280×720, 640×480, 640×360) |
| Video Compression |
Main stream: H.265/H.264/H.264+/H.265+, |
| Video Bit Rate |
32 Kbps to 20 Mbps |
| H.264 Type |
Baseline Profile, Main Profile, High Profile |
| H.265 Type |
Main Profile |
| Scalable Video Coding (SVC) |
H.264 and H.265 encoding |
| Bit Rate Control |
CBR,VBR |
| Region of Interest (ROI) |
1 fixed regions for each stream |
| Target Cropping |
Yes |
| Audio | |
| Audio Type | Mono sound |
| Audio Compression | G.711/G.722.1/G.726/MP2L2/PCM/MP3/AAC-LC |
| Audio Bit Rate | 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 | 8 kHz/16 kHz/32 kHz/48 kHz |
| Environment Noise Filtering | Yes |
| Network | |
| Protocols | TCP/IP, ICMP, HTTP, HTTPS, FTP, DHCP, DNS, DDNS, RTP, RTSP, RTCP, NTP, UPnP, SMTP, IGMP, 802.1X, QoS, IPv4, IPv6, UDP, Bonjour, SSL/TLS, PPPoE, SNMP, WebSocket, WebSockets, SRTP, SFTP |
| Simultaneous Live View |
Up to 6 channels |
| API | ONVIF (Profile S, Profile G, Profile T),ISAPI,SDK,ISUP |
| User/Host |
Up to 32 users. |
| Security |
IP address filter, basic and digest authentication for HTTP/HTTPS, TLS 1.3, host authentication (MAC address), watermark, RTP/RTSP over HTTPS, complicated password, AES128/256, Password protection, WSSE and digest authentication for Open Network Video Interface, TLS 1.2, 802.1X authentication(EAP-LEAP,EAP-TLS,EAP-MD5,EAP-PEAP), control timeout settings, HTTPS encryption, security audit log |
| Client |
iVMS-4200,Hik-Connect,Hik-Central |
| Network Storage |
NAS (NFS, SMB/CIFS) |
| Web Browser |
Free live view plug-ins: Chrome 80+, Firefox 80+, Edge 89+, |
| Image | |
| Image Parameters Switch |
Yes |
| Image Settings |
Saturation, brightness, contrast, sharpness, gain, white balance, adjustable by client software or web browser |
| Image Enhancement | BLC,HLC,3D DNR,Distortion Correction,Defog |
| Day/Night Switch |
Day, Night, Auto, Schedule |
| Wide Dynamic Range (WDR) |
120 dB |
| SNR | ≥ 52 dB |
| Privacy Mask |
4 programmable polygon privacy masks |
| Interface | |
| Ethernet Interface | 1 RJ45 10M/100M self-adaptive Ethernet port |
| On-Board Storage | Built-in memory card slot, support microSD/microSDHC/microSDXC card, up to 512GB |
| Built-in Speaker | Max. power consumption: 2 W, max. sound pressure level: 10 cm: 110 dB. |
| Audio | Built-in Microphone: Single-microphone |
| Event | |
| Basic Event | Motion detection (support alarm triggering by specified target types (human and vehicle)), video tampering alarm, exception, alarm input and output |
| Smart Event | Scene change detection |
| Linkage | Upload to FTP/NAS/memory card,notify surveillance center,trigger recording,trigger capture,send email |
| Deep Learning Function | |
| Face Capture | No |
| Perimeter Protection | Line crossing, intrusion, region entrance, region exiting Support alarm triggering by specified target types (human and vehicle) |
| General | |
| Power |
12 VDC ± 25%, 1.3 A, max. 15.6 W,Ø5.5 mm coaxial power plug,reverse polarity protection |
| Material |
Metal |
| Dimension |
Ø74.4 mm × 176.3 mm (Ø2.93" × 6.94") |
| Package Dimension |
234 mm × 120 mm × 117 mm (9.21" × 4.72" × 4.61") |
| Weight |
Approx. 515 g (1.1 lb.) |
| With Package Weight |
Approx. 760 g (1.7 lb.) |
| Storage Conditions |
-30 °C to 60 °C (-22 °F to 140 °F). Humidity 95% or less (non-condensing) |
| Startup and Operating Conditions |
-30 °C to 60 °C (-22 °F to 140 °F). Humidity 95% or less (non-condensing) |
| Language |
33 languages: English, Russian, Estonian, Bulgarian, Hungarian, Greek, German, Italian, Czech, Slovak, French, Polish, Dutch, Portuguese, Spanish, Romanian, Danish, Swedish, Norwegian, Finnish, Croatian, Slovenian, Serbian, Turkish, Korean, Traditional Chinese, Thai, Vietnamese, Japanese, Latvian, Lithuanian, Portuguese (Brazil), Ukrainian |
| General Function |
Heartbeat, mirror, flash log, password reset via email, password protection, anti-banding |
| Flashing Light |
Red and Blue Light |
| Approval | |
| EMC | CE-EMC: EN 55032:2015+A1:2020, EN 50130-4:2011+A1:2014, EN IEC 61000-3-2:2019+A1:2021, EN 61000-3-3:2013+A1:2019+A2:2021 |
| Safety | CB: IEC 62368-1: 2014+A11, CE-LVD: EN 62368-1: 2014/A11: 2017 |
| Environment |
CE-RoHS (2011/65/EU) |
| Protection |
IP67: IEC 60529-2013 |
| Anti-Corrosion Protection |
NEMA 4X (NEMA 250-2018) |


