Hikvision DS-2CD2346G2H-IU(4mm) 4MP AcuSense Turret with Microphone

Hikvision DS-2CD2346G2H-IU (4 mm) — 4 MP AcuSense turret with microphone

This is the 4 mm version of Hikvision's 4 MP G2H turret: AcuSense human and vehicle classification, DarkFighter low-light performance, a built-in microphone and 30 m of infrared in a compact all-metal IP67 housing. At 550 g and 138 mm across it is the smallest and lightest camera in the G2H range, and the cheapest to power.

AcuSense deep-learning classification separates people and vehicles from foliage, rain, shadows and animals, so line crossing, intrusion, region entrance and region exiting trigger only on real targets. Face capture is supported.

4 mm or 2.8 mm — which to order

Same camera, different lens. At 4 mm the field of view is 81.1° horizontal and the DORI figures are detect 78 m, observe 31 m, recognise 15 m, identify 7 m. At 2.8 mm the view widens to 100.2° but the figures fall to 63 m detect and 6 m identify.

Choose 4 mm where the camera looks along a length — a driveway, a side passage, a car park aisle — and you want usable detail further out. Choose 2.8 mm for breadth close in, such as a shop floor or a yard corner. The 4 mm also holds focus from 2.5 m rather than 1.9 m, so it is the weaker choice for anything mounted close to its subject, such as a doorway at head height.

Be realistic about the infrared, though: it reaches 30 m where the 4 mm lens detects to 78 m. In darkness this camera's useful range is set by the illuminator, not the optics. For a genuinely long unlit view, the bullet models in this range carry 60 m or 80 m IR.

What it has, and what it doesn't

The -IU suffix means a built-in microphone — audio is recorded alongside video with no extra hardware. What it does not have is a speaker, a strobe, or any alarm or audio terminal block. Its physical interfaces are the Ethernet port, the microSD slot and the reset key.

• Need two-way audio and an on-camera siren? The DS-2CD2346G2H-IS2U/SL adds both.
• Need to wire in a detector or sounder? You need a model with alarm I/O — this one has none.
• Need no audio at all? The plain -I version drops the microphone.

Low power is its quiet advantage

Maximum 9 W over 802.3af Class 3. That is the lowest draw of anything in the G2H family — the deterrence models need 802.3at at 18 W, twice as much. On a recorder with a fixed PoE budget shared across every port, that difference decides how many cameras the machine will actually run.

Imaging

• 1/3" progressive scan CMOS, 2688 × 1520 at 25 fps (50 Hz)
• F1.0 aperture, 0.001 lux in colour, 0 lux with IR on
• 120 dB WDR for entrances and forecourts shot into strong backlight
• 30 m Smart Supplement Light IR at 850 nm
• 4 mm fixed lens on an M12 mount, depth of field from 2.5 m
• BLC, HLC and 3D DNR; 4 programmable polygon privacy masks

Recording, storage and network

• H.265+/H.265/H.264+/H.264, 32 Kbps to 8 Mbps
• microSD/SDHC/SDXC to 512 GB, plus NAS (NFS, SMB/CIFS) and ANR to backfill footage recorded during a network outage. With a high-end Hikvision card, memory card encryption and health detection are supported.
• ONVIF Profile S/T/G, ISAPI and SDK; iVMS-4200, Hik-Connect and HikCentral; up to 6 simultaneous live view channels
• The Ethernet port is 10/100, not gigabit — ample at an 8 Mbps ceiling

Build and environment

• Metal cover and metal main body; IP67 to IEC 60529-2013
• −30 °C to 60 °C, humidity 95% or less non-condensing
• Ø138.3 mm × 115.4 mm, approx. 550 g

What you'll need with it

• An 802.3af (or better) PoE switch or NVR port, or a 12 VDC supply
• An AcuSense-capable Hikvision NVR to carry human/vehicle classification through to smart search on the recorder
• A microSD card for edge recording or ANR backfill — not supplied
• A wall or pole bracket unless it is going straight onto a flat soffit or ceiling

Frequently asked questions

Is the 4 mm better than the 2.8 mm?

Not better, different. It sees further with more detail over a narrower field. For close, wide coverage the 2.8 mm is the right choice.

Does it record sound?

Yes — the -IU has a built-in microphone. Check that recording audio is lawful and signposted for your site before enabling it.

Can it trigger a siren?

Not on its own. There is no speaker and no alarm output. The IS2U/SL version in this range adds a strobe and an audible warning.

Will it work on a third-party NVR?

It supports ONVIF Profile S, T and G, so it will record on most ONVIF recorders. AcuSense classification is best supported on Hikvision recorders.

Trade pricing

Zenith Security Co is an authorised Hikvision partner. Prices shown are for trade account holders — contact us for account terms and stock availability.