The 2MP bullet with audio
The Hikvision DS-2CD2021G0-LIU 2.8mm is the audio-equipped 2MP IP bullet from Hikvision’s standard 2-series range. The U in the model name stands for the built-in microphone, which captures audio alongside the video and stores it on the NVR. Visual context matched with audio context: a delivery person at the gate identifying themselves, a verbal exchange between two people approaching the property, the sound of a car door closing.
Audio on residential CCTV is more useful than people expect. Most events that matter have an audio component. The conversation before a knock at the door. The sound of breaking glass. The distinctive engine note of a regular vehicle versus an unfamiliar one. Hikvision audio is good enough quality to be genuinely useful in playback, not just a marketing tick-box.
What this camera is actually good at
- 2MP resolution. Sharp enough for general-purpose surveillance and basic identification at close range.
- Built-in microphone. Audio captured alongside video, stored on the NVR for playback.
- Wide 2.8mm lens. 102° horizontal view. Good situational coverage from a single mount.
- IR illumination up to 30 metres. Total-darkness coverage for residential positions.
- IP67 weather-sealed. Built for outdoor use in Highveld weather.
- H.265+ compression. Storage-efficient at 2MP.
- Standard motion detection. Without AcuSense AI classification, with the trade-off keeping the price reasonable.
Where this camera belongs on your property
- Front-door positions where audio of conversations at the door adds context to the visual record
- Garden and patio areas where sound of activity matters as much as the visual
- Cluster home porches watching the entrance and capturing audio
- Small business reception areas indoors
- Supplementary positions in larger multi-camera installs where audio capture at one or two positions is the priority
If you want a different focal length or step up
- The 4mm version of this same camera is the right call for tighter views at slightly longer distances.
- The DS-2CD2041G0-LIU is the 4MP step up with audio. Same audio capability, doubled resolution.
- The DS-2CD2046G2H-I 4mm adds full AcuSense AI classification at 4MP.
If you want to compare at this level
- The DS-2CD1023G0E-I 2.8mm is the entry-level 1-series alternative without audio support, at a lower price point.
- The DS-2CD2021G1-I is the next-generation 2MP option without audio.
Pairs cleanly with the DS-7616NXI-K2 16-channel NVR. Our home CCTV installation guide covers system design and where audio cameras add the most value.
Audio CCTV has legal implications worth knowing about
South African law requires that audio recording on private property be reasonably proportionate to the security purpose. Most domestic and small-business installations are well within sensible legal bounds, but it is worth being clear with anyone working at the property (gardeners, helpers, visitors) that audio is recorded. Signage helps. We talk this through with every audio-camera install across Pretoria East, Centurion, Midrand, and Johannesburg.
Full 3-year Hikvision South Africa warranty through authorised distribution. Pricing on the CCTV installation prices page.
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