DS-2CD2T23G2-2LI2U(4mm) - is a bullet camera with 4mm lens designed for precise and reliable professional video surveillance, ideal for monitoring medium-long areas thanks to the optimized viewing angle. The 2 MP Full HD resolution ensures clear and defined images, while the Acusense technology with artificial intelligence allows advanced recognition of people and vehicles , reducing false alarms. The Smart Hybrid Light system with IR and white light up to 60 m guarantees excellent visibility even in total absence of light, supported by the real WDR at 120 dB for backlit scenes. The integrated double array microphone , H.265+ compression, IP67 protection complete the equipment, making it ideal for high-security outdoor contexts. Hikvision
DS-2CD2T23G2-2LI2U(4mm) – FIXED LENS BULLET CAMERA 4mm 2MP - HUMAN AND VEHICLE DETECTION - DEEP LEARNING FUNCTION

The Hikvision DS-2CD2T23G2-2LI2U bullet IP camera with 4mm lens is a reliable solution for professional video surveillance, ideal for monitoring medium-long areas with high precision. The 2 MP Full HD resolution guarantees clear and stable images, while Acusense technology with artificial intelligence enables intelligent recognition of people and vehicles , reducing false alarms. The Smart Hybrid Light system with IR and white light up to 60 m ensures effective visibility even in total darkness, supported by true 120 dB WDR for scenes with high contrast. The integrated dual array microphone , H.265+ compression, and IP67 protection complete the features, making it ideal for high-security outdoor installations.
Main features:
- 2 MP Full HD resolution
- 4mm fixed optics for medium distance shooting
- Acusense AI technology for people and vehicles
- Smart Hybrid Light IR and white light up to 60 m
- Real WDR 120 dB
- Built-in dual array microphone
- H.265+ video compression
- IP67 protection
Further details
The 4mm optic is ideal for monitoring medium to long areas , offering a balanced field of view that allows for greater depth of observation than wide-angle optics, improving identification accuracy.
The 2 Megapixel CMOS sensor (1920×1080) guarantees sharp and stable images , suitable for professional contexts where a clear and reliable view of details is required.
Deep learning-based Acusense technology intelligently analyzes the scene, distinguishing real events from environmental disturbances and drastically reducing false alarms .
The vehicle detection function allows for precise monitoring of driveways, parking lots and transit areas, making the camera ideal for residential and industrial applications.
The advanced motion detection system supports target classification, generating more accurate notifications and optimizing the recording of relevant events.
Deep learning features integrate perimeter protection such as line crossing and intrusion detection , with intelligent recognition of people and vehicles for more efficient surveillance.
Support for major network protocols such as ONVIF, TCP/IP, HTTPS, RTSP, IPv4 and IPv6 ensures maximum compatibility , simple integration and secure management in IP video surveillance systems.
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Technical data sheet
| DS-2CD2T23G2-2LI2U(4mm) | |
| Room | |
| Image Sensor | 1/2.7" Progressive Scan CMOS |
| Max. Resolution | 1920 × 1080 |
| 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, 4 mm |
| Focal Length & FOV | horizontal FOV 91°, vertical FOV 48°, diagonal FOV 110° |
| Lens Mount | M12 |
| Iris Type | Fixed |
| Openings | F1.6 |
| Depth of Field | 1.1 m to ∞ |
| Illuminator | |
| Supplement Light Type | IR, White Light |
| Supplement Light Range | Up to 60 m |
| Smart Supplement Light | Yes |
| IR Wavelength | 850mm |
| Video | |
| Main Stream | 50 Hz: 25fps (1920×1080, 1280×720) 60 Hz: 30fps (1920×1080, 1280×720) |
| Sub-Stream |
50Hz: 25fps (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 8 Mbps |
| H.264 Type |
Baseline Profile, Main Profile, High Profile |
| H.265 Type |
Main Profile |
| Bit Rate Control |
CBR,VBR |
| Region of Interest (ROI) |
1 fixed region for main stream and sub-stream |
| Scalable Video Coding (SVC) |
H.264 and H.265 encoding |
| Target Cropping |
Yes |
| Audio | |
| 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 160 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 | |
| Security |
Password protection, complicated password, HTTPS encryption, IP address filter, Security Audit Log, basic and digest authentication for HTTP/HTTPS, TLS 1.1/1.2/1.3, WSSE and digest authentication for Open Network Video Interface |
| Simultaneous Live View |
Up to 6 channels |
| API | ONVIF (Profile S, Profile G, Profile T),ISAPI,SDK,ISUP |
| 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 |
| User/Host |
Up to 32 users. |
| Client |
iVMS-4200,Hik-Connect,Hik-Central |
| Network Storage |
NAS (NFS, SMB/CIFS),Auto Network Replenishment (ANR), |
| Web Browser |
Plug-in required live view: IE 11, |
| Image | |
| Image Parameters Switch |
Yes |
| Day/Night Switch |
Day, Night, Auto, Schedule |
| Image Settings |
Rotate mode |
| Wide Dynamic Range (WDR) |
120 dB |
| SNR | ≥ 52 dB |
| Image Enhancement | BLC, HLC, 3D DNR |
| Privacy Mask |
8 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 Microphone | Built-in Microphone: Arrayed dual-microphone |
| Reset Key | Yes |
| Event | |
| Basic Event | Motion detection (support alarm triggering by specified target types (human and vehicle)), video tampering alarm, exception |
| Smart Event | Face detection |
| Linkage | Upload to FTP/NAS/memory card,notify surveillance center,send email,trigger recording,trigger capture |
| Deep Learning Function | |
| Perimeter Protection | Line crossing, intrusion Support alarm triggering by specified target types (human and vehicle) |
| General | |
| Power |
12 VDC ± 25%, 0.58 A, max. 7 W, Ø5.5 mm coaxial power plug, reverse polarity protection, |
| Material |
Metal |
| Dimension |
88.7 mm × 93.1 mm × 286.7 mm (3.5" × 3.7" × 11.3") |
| Package Dimension |
386 mm × 156 mm × 155 mm (15.2" × 6.1" × 6.1") |
| Weight |
Approx. 1115 g (2.5 lb.) |
| With Package Weight |
Approx. 1640 g (3.6 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 |
| 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 RCM: AS/NZS CISPR 32: 2015, IC: ICES-003: Issue 7, KC: KN32: 2015, KN35: 2015 |
| Safety | CB: IEC 62368-1: 2014+A11, CE-LVD: EN 62368-1: 2014/A11: 2017 BIS: IS 13252 (Part 1): 2010/IEC 60950-1: 2005, LOA: IEC/EN 60950-1 |
| Environment |
CE-RoHS (2011/65/EU) |
| Protection |
IP67: IEC 60529-2013 |


