IP Cameras › Uho-S2-M4
UniarchIndoor Pan & Tilt Wi-Fi
4MP Indoor Pan & Tilt Wi-Fi
Uho-S2-M4
4MP indoor Wi-Fi camera with a real motorized pan-tilt head — 340° pan, -5° to 55° tilt, Auto Tracking and two-way audio. No network cable, just power and connect over 2.4GHz Wi-Fi.
4 MP · 2560×1440@25fpsWi-Fi · 2.4GHz built-in antennaAuto Tracking · follows moving subjects2-Way Audio · mic + speakerHuman Detection · + audio detectionMicroSD · up to 512GB
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The Uniarch Uho-S2-M4 is a 4MP indoor Wi-Fi camera with a real motorized pan-tilt head, not just a fixed mount angle. It pans 340° and tilts from -5° to 55°, with Auto Tracking that follows moving subjects and 20 presets for jumping straight to a spot you check often. Built-in mic and speaker support two-way audio, and it detects people over Wi-Fi with no network cable required.
Is this the right camera for you?
Plain-language guide for buyers and installers — based only on what this camera actually does.
Baby & family monitoring, hands-freeAuto Tracking follows your baby or family members around the room on its own, and Audio detection flags loud sounds so you don't have to watch the feed constantly.
Whole-room coverage from one cornerMotorized 340° pan and -5° to 55° tilt reach corners a fixed camera can't, and 20 presets jump straight to the doorway, crib or desk.
Check in and talk backBuilt-in mic and speaker support two-way audio — talk to family, pets or visitors remotely through the phone app.
Small offices & countersHuman body detection cuts down false alerts versus plain motion detection, and it runs over Wi-Fi so there's no cable to run to the front desk.
Local recording you controlMicroSD edge storage up to 512GB keeps footage on the camera itself — no monthly cloud subscription required to have a recording.
5-minute DIY setupNo electrician needed — plug in the Micro-USB power, join your Wi-Fi from the app, and start watching in minutes.
Not the right pick if you need…
- Outdoor or weatherproof installation — this is an indoor-only camera with no IP-rated enclosure
- PoE power — there's no PoE port, it runs on its own DC5V/1.5A Micro-USB adapter
- A wired network fallback — this model connects over Wi-Fi only, there is no Ethernet port
- Long-distance night vision — IR reaches 10m (33ft), built for room-scale distances, not yards
- On-screen privacy masking from the phone app — Privacy Mask only works when the camera is connected to an NVR
- Vehicle, pet, or crying-specific detection — this model does human body, motion and audio detection only
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Key Features
Complete list from the official datasheet.
High quality image with 4MP, 1/3" CMOS sensor
4MP (2560×1440)@25/20fps; 3MP (2304×1296)@30/25fps; 2MP (1920×1080)@30/25fps
Ultra 265, H.265, H.264
Built-in Mic & Speaker, support two-way audio, offer better interaction
IR night vision, up to 10m (33ft) IR distance
Support 512 G Micro SD card
Wi-Fi connection and easy installation
Night vision: infrared only
Switchable Auto/Manual IR — set it per room.
IR MODE
Invisible infrared — discreet black & white night vision
IR night vision up to 10 m (33 ft.) at 850 nm, with Auto/Manual IR On/Off control. This model has a single IR illuminator only, no warm-light module.
How wide a view at each distance
Scene width covered at typical mounting distances — the number you need to work out how many cameras a wall, yard or aisle takes.
| Distance | 79.0° |
|---|---|
| 5 m16 ft | 8.2 m27.0 ft |
| 10 m33 ft | 16.5 m54.1 ft |
| 15 m49 ft | 24.7 m81.1 ft |
| 20 m66 ft | 33.0 m108 ft |
| 30 m98 ft | 49.5 m162 ft |
Calculated from the horizontal field of view in the specifications below: width = 2 × distance × tan(FOV ÷ 2). Lens distortion and mounting angle are not included.
Who uses it, where to place it and how to set it up
Written for the Uho-S2-M4 from its official datasheet: 4 MP indoor pan-tilt camera, fixed 4.0 mm lens with a wide 79.0° view, 340° pan / -5° to 55° tilt with auto tracking, 10 m IR, human body and audio detection, 2.4 GHz Wi-Fi only, 5 V Micro-USB power.
Who it is for
- Shop counters and small offices — The 79.0° lens takes in about 8.2 m of a shop at 5 m, and 4 MP (2560×1440) gives more detail on the till and the customer than the 3 MP S2 model.
- Families with children — Auto tracking follows a child around the living room, and audio detection sends an alert when the room gets loud, without anyone watching the feed.
- Relatives checking on someone at home — Two-way audio through the built-in mic and speaker, and 20 presets for the bed, kitchen and front door, make a quick check-in from the phone easy.
- Larger open rooms — Lounges, open-plan kitchens and small classrooms suit the wider 79.0° lens and the 340° pan better than the narrower 67.3° Uho-S2-M3-A.
Where and how to place it
- High shelf or ceiling — Tilt reaches only 5° below level, so a table-top camera cannot look down at a counter or floor. Put it on a high shelf, or ceiling-mount it upside down with the 180° image flip, so the 55° side of the tilt points down.
- Face the room, not the window — BLC and HLC are both N/A on this model (only digital WDR), so a person standing in front of a bright window or glass shop door turns into a dark shape. Mount it on the window side looking in, so light falls on faces.
- Point the 20° gap at the wall — Pan is 0–340°, leaving 20° the head cannot reach. Against a wall or in a corner that gap is behind the camera; in the middle of a shop, aim it at the least important side.
- Power and Wi-Fi — Power is DC 5 V / 1.5 A on Micro-USB; run the cable along the wall, out of reach of children and pets. There is no network port, so check the 2.4 GHz signal at the spot with a phone before fixing it in place.
- Indoor conditions only — Working range is -10 °C to 55 °C at up to 95% RH non-condensing, with no IP rating. Keep it out of bathrooms, kitchens directly over the stove, and spots where it will be wiped with water.
What the 4.0 mm lens sees in a room
With 79.0° horizontally, the Uho-S2-M4 sees about 4.9 m of wall at 3 m and 8.2 m at 5 m, roughly a quarter wider than the 67.3° Uho-S2-M3-A, while its 2560-pixel sensor keeps about 311 pixels per meter at 5 m.
| Uho-S2-M4 · 4.0 mm | |
|---|---|
| Horizontal view angle | 79.0° |
| Width covered at 3 m | 4.9 m |
| Width covered at 5 m | 8.2 m |
| Pixels per meter at 5 m | ≈ 311 px/m |
| IR night vision | 10 m · 850 nm |
| Pan range | 0°–340° |
| Tilt range | -5° to 55° |
| Pan / tilt speed | 17–50°/s |
| Presets | 20 |
- Pick the Uho-S2-M4 for a shop floor or lounge where 8.2 m of width at 5 m means fewer presets to cover the room.
- Pick the 3 MP Uho-S2-M3-A instead if you need pet or crying detection, which this model does not list.
Widths are calculated from the 79.0° horizontal view angle (width = 2 × distance × tan(angle ÷ 2)); pixels per meter = 2560 horizontal pixels ÷ width. The datasheet gives no DORI distances. IR, pan/tilt and preset figures are from the official datasheet; the Uho-S2-M3-A angle is from its own datasheet.
Full Specifications
Complete official specifications from the manufacturer's datasheet (technical values in English).
Camera
| Max Resolution | 4 MP |
| Sensor | 1/3.0" CMOS |
| Min. Illumination | Colour: 0.01 lux (F2.0, AGC ON), 0 lux with IR on |
| Day/Night | IR-cut filter with auto switch (ICR) |
| Shutter | Auto/Manual, 1/4 to 1/100000 s |
| S/N | > 52 dB |
| WDR | DWDR |
Lens
| Focal Length | 4.0 mm |
| Iris Type | Fixed |
| Iris | F2.0 |
| Field of View (H) | 79.0° |
| Field of View (V) | 42.3° |
| Field of View (D) | 85.1° |
Illuminator
| Supplemental Light | IR |
| Illumination Distance (IR) | Up to 10 m (33 ft.) |
| Wavelength | 850 nm |
| IR On/Off Control | Auto/Manual |
Video
| Video Compression | Ultra 265, H.265, H.264 |
| Frame Rate | Main Stream: 4MP (2560×1440), max. 25 fps; 3MP (2304×1296), max. 30 fps; 2MP (1920×1080), max. 30 fps; 720P (1280×720), max. 30 fps · Sub Stream: 640×360, max. 30 fps; 2CIF (704×288), max. 30 fps; CIF (352×288), max. 30 fps |
| Video Bit Rate | 128 Kbps to 6144 Kbps |
| U-code | Support |
| OSD | Up to 2 OSDs |
| Privacy Mask | Support (only NVR) |
| ROI | Up to 8 areas |
| Video Stream | Dual streams |
Image
| White Balance | Auto, Outdoor, Fine tune, Sodium lamp, Locked, Auto2 |
| Digital Noise Reduction | 2D/3D DNR |
| Smart IR | Support |
| Flip | Normal, Flip vertical, Flip horizontal, 180° |
| Dewarping | N/A |
| HLC | N/A |
| BLC | N/A |
| Defog | Digital defog |
Events
| Basic Detection | Human body detection, Motion detection, Audio detection |
| General Function | IP address filtering, Access policy, ARP protection, RTSP authentication, User authentication, HTTP authentication |
Intelligent
| Auto Tracking | Support |
Audio
| Audio Compression | G.711U, G.711A |
| Audio Bitrate | 64 Kbps |
| Two-way Audio | Support |
| Suppression | Support |
| Sampling Rate | 8 kHz |
Storage
| Edge Storage | MicroSD, up to 512 GB |
| Network Storage | ANR |
Network
| Wi-Fi | 2.4G Wi-Fi (IEEE802.11b/g/n), built-in antenna |
| Protocols | IPv4, TCP, UDP, DHCP, RTSP, DNS, DDNS, NTP, HTTP |
| Compatible Integration | API |
| Client | APP, Uniarch client |
| Web Browser | Plug-in required live view: IE 10+, Chrome 45+, Firefox 52+, Edge 79+ |
Wi-Fi
| Wireless Standards | IEEE802.11b/g/n |
| Frequency Range | 2.4 GHz to 2.4835 GHz |
| Channel Bandwidth | 20 MHz Support |
| Modulation Mode | 802.11b: CCK, QPSK, BPSK; 802.11g/n: OFDM/HT |
| Wi-Fi Security | 64/128-bit WEP, WPA-PSK/WPA2-PSK |
| Transmit Power | 802.11b: 17±1.5 dBm@11 Mbps; 802.11g: 14±1.5 dBm@54 Mbps; 802.11n: 12.5±1.5 dBm@150 Mbps |
| Receive Sensitivity | 802.11b: -90 dBm@11 Mbps (Typical); 802.11g: -75 dBm@54 Mbps (Typical); 802.11n: -74 dBm@150 Mbps (Typical) |
| Transmission Rate | 802.11b: 11 Mbps; 802.11g: 54 Mbps; 802.11n: up to 150 Mbps |
PTZ
| Pan Range | 0° ~ 340° |
| Pan Speed | 17°/s ~ 50°/s, Preset speed: 50°/s |
| Tilt Range | -5° ~ 55° |
| Tilt Speed | 17°/s ~ 50°/s, Preset speed: 50°/s |
| Number of Presets | 20 |
Interface
| Audio I/O | N/A |
| Alarm I/O | N/A |
| Built-in Mic | Support |
| Built-in Speaker | Support |
| WIFI | Support |
| Network | N/A |
Certification
| EMC | CE-EMC (EN 55032, EN 61000-3-3, EN IEC 61000-3-2, EN 55035); FCC (FCC 47 CFR part15 B) |
| RF | FCC ID (FCC CFR 47 part15 C); CE RED (EN 301 489-1, EN 301 489-17, EN 300 328, EN 62311) |
| Safety | CE LVD (EN 62368-1) |
| Environment | CE-RoHS (2011/65/EU; (EU) 2015/863); WEEE (2012/19/EU) |
General
| Power | DC 5 V/1.5 A, Micro USB interface |
| Dimensions | Φ80 mm × 120 mm (Ø3.1" × 4.8") |
| Weight | 0.18 kg (0.40 lb.) |
| Working Environment | -10 °C to 55 °C (-14 °F to 131 °F), Humidity: ≤ 95% RH (non-condensing) |
| Storage Environment | -10 °C to 55 °C (-14 °F to 131 °F), Humidity: ≤ 95% RH (non-condensing) |
| Reset Button | Support |
| LED Indicator | 1, red/blue |
Dimensions
Engineering drawing reproduced 1:1 from the official datasheet.
unit: mm (in.)
| Dimensions | Φ80 × 120 mm (Ø3.1" × 4.8") |
| Weight | 0.18 kg (0.40 lb.) |
| Pan range | 0° – 340° |
| Tilt range | -5° – 55° |
4MP Indoor Wi-Fi Pan-Tilt Camera FAQ — Uho-S2-M4
What Wi-Fi does the Uho-S2-M4 connect to?
It uses 2.4G Wi-Fi (IEEE 802.11 b/g/n) with a built-in antenna — the band with the longest reach through walls, supported by virtually every home and shop router. Network protocols include IPv4, TCP, UDP, DHCP, RTSP, DNS, DDNS, NTP and HTTP.
How sharp is the image compared with a basic 2MP camera?
The main stream records 4MP (2560×1440) at up to 25 fps — twice the pixels of 1080p — with 3MP and 2MP modes at 30 fps when you prefer smoother motion. Ultra 265/H.265/H.264 with U-code keeps files small, with bit rate from 128 to 6144 Kbps.
Does it really follow people around the room?
Yes. Human body detection identifies a person and auto tracking drives the motorized mount through 340° of pan and -5° to 55° of tilt to keep them in frame. Motion and audio detection round out the alerts, and the 79.0° lens view limits blind spots.
Where is video stored — do I need a recorder?
A MicroSD slot takes cards up to 512 GB, so the camera records standalone with no recorder. If you do use network storage, ANR support fills recording gaps after a connection drop. RTSP lets integrators pull the stream into existing systems.
Is the night vision good enough for a bedroom or shop at night?
Yes for indoor distances: Smart IR at 850 nm reaches up to 10 m (33 ft) with auto or manual control, and the sensor works down to 0.01 lux in color, 0 lux with IR on. DWDR and 2D/3D noise reduction keep the picture clean in mixed light.
Why does the Uho-S2-M4 send alerts when only my cat or dog moves, and how do I reduce them?
The datasheet lists human body detection, motion detection and audio detection, but no pet class, so plain motion detection reacts to any animal, curtain or TV picture. Switch alerts to human body detection only, and keep moving curtains, fans and screens out of the preset you leave it on. If pet alerts are what you actually want, the 3 MP Uho-S2-M3-A lists ultra motion detection with a separate pet class.
Can the Uho-S2-M4 look out through a window at night, for example at my parked car?
By day yes; at night the 850 nm IR reflects off the glass and the picture turns into a white glare or a reflection of the room. Set IR to manual off (Auto/Manual control is listed), keep the room lights off, and let a street or porch light illuminate the car. Even then, at night you will see only what the outside light shows, so for a car on the street an outdoor camera is the better choice.
Will the Uho-S2-M4 see customers' faces clearly at a shop counter with a glass door behind them?
Not reliably if the camera looks toward the bright door: this model lists only digital WDR, with BLC and HLC both N/A, so faces against daylight come out dark. Place it behind or beside the cashier looking toward the customer with the door to the side, keep the customer within about 3–5 m, and use a preset on the till. At 5 m the 79.0° lens still gives about 311 pixels per meter, enough to recognize a regular customer.
How do I stop strangers from accessing my Uho-S2-M4, and can I hide part of the picture?
Change the admin password at first setup, keep the firmware updated, and give family or staff their own access by sharing from the owner's app account. The datasheet lists user, HTTP and RTSP authentication, IP address filtering, access policy and ARP protection, and Wi-Fi security up to WPA2-PSK. Privacy masking is listed as "Support (only NVR)", so with the app alone, keep a bathroom door or a private desk out of view by where you set the presets.
What happens to the Uho-S2-M4 in a power cut, and can a USB power bank keep it going?
It has no internal battery, so it switches off and restarts by itself when power returns; recordings already on the microSD card are kept. Because it runs on DC 5 V / 1.5 A Micro-USB, a power bank that supplies 1.5 A can keep it running. The datasheet does not list power consumption, so plan with the 5 V × 1.5 A = 7.5 W supply rating as the worst case: a 10000 mAh bank (about 30 Wh usable) then lasts at least about 4 hours. Recording to the card continues without the router, but remote viewing needs the router powered too.
How much internet upload does the Uho-S2-M4 need when several family members watch it?
Each remote viewer is a separate stream leaving your home line. The 4 MP main stream can use up to 6144 Kbps, so two people watching full quality at the same time need about 12 Mbps of upload. Phones normally use the 640×360 sub stream, which needs far less, so keep the app on that stream for quick checks and switch to the main stream only when you need detail.
Do I need a cloud subscription to record?
No. Recording to the on-board microSD card works without any subscription. If you want to record to your own NVR or server, check the protocols listed in the specification table (RTSP / ONVIF) or send us the name of your recording software and we will confirm compatibility before you order.
Can the Uho-S2-M4 be installed outdoors, for example at a home entrance or porch?
No, the Uho-S2-M4 is an indoor camera: its specification lists no IP protection rating, its operating range is -10 °C to 55 °C, and it runs from a 5 V/1.5 A Micro USB supply. For an entrance, mount it inside facing the door; with 340° pan, -5° to 55° tilt and IR night vision up to 10 m it covers a hallway, living room or shop floor.
How many days of video does a microSD card hold in the Uho-S2-M4?
It depends on the bit rate you set, which ranges from 128 to 6144 Kbps. At the 6144 Kbps maximum with continuous recording the Uho-S2-M4 writes about 66.4 GB per day, so a 128 GB card lasts about 1.9 days, 256 GB about 3.9 days and the maximum 512 GB card about 7.7 days. At 2048 Kbps (about 22.1 GB per day) the same cards last about 5.8, 11.6 and 23 days.
What is the difference between the Uho-S2-M4 and the Uho-S2E-M4?
The Uho-S2-M4 is Wi-Fi only, since its specification lists no wired network port, while the Uho-S2E-M4 is the 4MP Wi-Fi model with an RJ45 Ethernet port. Pick the Uho-S2E-M4 if the Wi-Fi signal at the mounting spot is weak or you prefer a cable connection; the Uho-S2-M4 is enough where 2.4 GHz Wi-Fi coverage is good.
Which app and software does the Uho-S2-M4 work with, and can it be mounted upside down?
The Uho-S2-M4 is set up and viewed in the mobile APP or the Uniarch client, or in a web browser with plug-in live view (IE 10+, Chrome 45+, Firefox 52+, Edge 79+); RTSP with authentication and an API are supported, while ONVIF is not listed. The image can be flipped 180° in settings, so the picture stays upright if the camera is mounted upside down. Power is DC 5 V/1.5 A through Micro USB.
Ordering questions — samples, shipping, payment, lead time and genuine stock — are answered once on our FAQ page.
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