Eufy Cam S4

A small MicroSD card included with the device for local storage.

Having a MicroSD card included saves you from purchasing additional storage separately.

Powered by direct electrical connection to your home's power supply.

Wired power ensures continuous operation without battery maintenance or replacement concerns.

Power over Ethernet (PoE) is a technology that delivers both electrical power and data through a single Ethernet cable, eliminating the need for separate power adapters.

A built-in battery that can be recharged without replacement.

Rechargeable batteries are more convenient and environmentally friendly than disposable batteries.

The expected duration the device can operate on a single battery charge or set of batteries.

Battery life varies depending on usage patterns, connectivity type, and device features.

The ability to charge the device's battery using solar panels.

Solar charging provides continuous power for outdoor devices without needing to access electrical outlets.

Range: The 2.4 GHz band offers a longer range, meaning it can cover larger areas and penetrate solid objects like walls more effectively than 5 GHz.

Speed: Generally, 2.4 GHz provides slower speeds compared to 5 GHz due to a lower maximum data rate.

Interference: More prone to interference since many other devices (like cordless phones, microwaves, and Bluetooth devices) operate on the 2.4 GHz frequency, leading to potential congestion and slower network performance.

Range: Offers a shorter range compared to 2.4 GHz and may have difficulty penetrating walls and other obstacles.

Speed: Typically provides faster speeds and higher data rates due to more available bandwidth.

Interference: Less prone to interference as fewer devices operate on this frequency, leading to a more stable connection.

Ethernet is a widely used technology for wired networking, providing a stable and high-speed connection between devices on a local area network (LAN).

Speed: Ethernet can offer higher and more consistent speeds compared to Wi-Fi. Modern Ethernet standards can support speeds from 100 Mbps (Fast Ethernet) to 10 Gbps (10 Gigabit Ethernet) and beyond.

Stability and Reliability: Because it uses a wired connection, Ethernet is less susceptible to interference from other devices and physical barriers, leading to a more stable and reliable connection.

Lower Latency: Ethernet typically offers lower latency compared to Wi-Fi, making it ideal for applications that require real-time data transfer, such as online gaming and video conferencing.

Security: A wired connection is generally more secure than a wireless one, as physical access to the network is required to intercept data.

4G is the fourth generation of mobile network technology, offering significant improvements over its predecessor, 3G.

Speed: Offers download speeds ranging from 5 Mbps to 50 Mbps and even higher in optimal conditions. This allows for smooth streaming of high-definition videos, fast downloads, and responsive web browsing.

Latency: Reduced latency compared to 3G, improving real-time applications such as online gaming and video conferencing.

Capacity: Supports a higher number of simultaneous connections, making it more suitable for densely populated areas.

Coverage: Widespread availability, with extensive networks in urban and many rural areas.

Built-in memory for storing recordings, settings, or other data.

Internal storage provides immediate access to stored content without relying on external memory cards or cloud services.

A slot for inserting a MicroSD card to expand storage capacity.

MicroSD card slots allow you to increase storage space and maintain local control over your recordings.

Online storage and processing services provided by the manufacturer.

Cloud services enable remote access to recordings, advanced AI features, and automatic backups of your data.

Google Home serves as a central hub for a variety of smart devices, including lights, thermostats, cameras, and speakers. It leverages Google Assistant for voice control, enabling users to manage their smart home with simple commands.

Amazon Alexa is one of the most widely used smart home systems, known for its compatibility with a vast array of devices. Users can control everything from smart lights to appliances using voice commands through Echo devices.

Apple HomeKit is designed for users in the Apple ecosystem, providing a seamless way to control compatible smart devices through iOS devices using the Home app or Siri. It emphasizes security and user privacy.

HomeKit Secure Video records the camera's motion clips to iCloud, encrypted end to end, and analyzes them on a home hub (HomePod, Apple TV or iPad) instead of the maker's cloud.

It is not the same as Apple HomeKit support: many cameras show their live view in the Home app but cannot record with HomeKit Secure Video. Recording needs an iCloud+ plan (50 GB for one camera, 200 GB for up to five, 2 TB for any number), and the clips do not count against its storage.

SmartThings is a flexible platform that connects a wide range of devices from different brands, offering a unified interface for control. It supports various communication protocols, allowing for extensive device compatibility.

Home Assistant is an open-source platform that allows for extensive customization and integration of a wide variety of smart devices. It supports a multitude of protocols and brands, making it ideal for tech-savvy users.

Matter is a unified, open-source connectivity protocol designed to standardize and simplify communication between smart home devices from different manufacturers. Developed by the Connectivity Standards Alliance (formerly the Zigbee Alliance), Matter aims to improve interoperability, security, and reliability across various smart home ecosystems.

Cameras were left out of the standard until Matter 1.5, published in November 2025, which added camera device types with live video and audio streaming over WebRTC, two-way talk, motion detection, event history and pan-tilt-zoom control. Before that release a camera could only reach a Matter ecosystem through its hub side, bridging the accessories paired to it, never its own video feed.

Because the camera device types are this recent, support arrives model by model and often through a firmware update, so a camera that works with Apple Home, Alexa or Google Home today is not necessarily a Matter device.

High Definition video recording at 720p resolution (1280x720 pixels).

HD video provides clear footage suitable for identifying people and objects in most home security applications.

2K video recording at 1440p resolution (2560x1440 pixels).

2K video offers significantly more detail than HD, making it easier to identify faces and read text in recordings.

Ultra High Definition video recording at 2160p resolution (3840x2160 pixels).

4K video provides the highest level of detail, allowing you to zoom in on recordings while maintaining clarity.

High Dynamic Range imaging that balances bright and dark areas in the same frame.

HDR improves video quality in challenging lighting conditions, such as bright backlighting or deep shadows.

Infrared night vision that provides black and white images in darkness.

Black and white night vision ensures you can see visitors clearly even in complete darkness.

Advanced night vision that maintains color images in low light conditions.

Color night vision provides more detailed and natural-looking footage in low light, making identification easier.

Continuous live video feed available at all times.

24/7 streaming allows you to monitor your property in real-time whenever you want to check in.

Continuous recording that stores all video footage, not just triggered events.

24/7 recording ensures you never miss anything and can review any time period, even if no motion was detected.

Storage of video clips triggered by specific events like motion or alerts.

Event-based recording saves storage space while capturing all important incidents for later review.

The ability to store event recordings locally when internet connection is unavailable.

Offline storage ensures you don't lose important recordings during network outages.

The ability to continue recording events during power outages using battery backup.

Battery-powered recording ensures security coverage even during power failures.

The proportional relationship between video width and height (e.g., 16:9, 4:3).

Aspect ratio determines how the video will appear on different screens and affects the field of view.

The angular extent of the scene captured by the camera, typically measured in degrees.

A wider field of view covers more area but may reduce detail, while a narrower view provides more detail of a specific area.

Pan & Tilt refers to the movement of a camera.

- Pan means rotating left or right (horizontal movement).

- Tilt means moving up or down (vertical movement).

Whether the camera has more than one lens, and what the second lens does.

- 180° panoramic: two lenses whose images are stitched into one wide view, so a single camera covers what would take two.

- Wide + zoom: a fixed wide lens keeps the whole scene while a telephoto lens, usually on a pan-tilt head, zooms in on and follows what moves.

- Wide + pan-tilt: a fixed wide lens plus a second lens that pans and tilts, without telephoto zoom.

- Two directions: two lenses pointing different ways, shown as two separate views.

RTSP (Real-Time Streaming Protocol) is a network control protocol designed to manage real-time streaming of multimedia data, such as video and audio. It was developed by the IETF (Internet Engineering Task Force) in 1996 and is widely used in applications like IP cameras, surveillance systems, media players, and streaming servers.

Detection of movement within the camera's field of view.

Motion detection is the most basic form of activity monitoring, triggering recordings and alerts when movement occurs.

Advanced AI detection that can distinguish between people and other moving objects.

Person detection reduces false alarms from pets, vehicles, or environmental factors like moving trees.

AI detection specifically designed to identify pets and wildlife.

Animal detection helps differentiate between pets and potential intruders, reducing unnecessary alerts.

AI detection that can identify cars, trucks, and other vehicles.

Vehicle detection is useful for monitoring driveways and can alert you to deliveries or unexpected visitors.

AI technology that learns and recognizes specific individuals.

Familiar face recognition can provide personalized alerts and reduce notifications when known family members are detected.

AI detection specifically designed to identify delivered packages.

Package detection alerts help you know when deliveries arrive and can deter package theft.

Audio detection of the distinctive sound of breaking glass.

Glass break detection provides an additional layer of security by identifying potential break-in attempts.

Audio detection of baby crying sounds for childcare monitoring.

Baby cry detection can alert parents when their child needs attention, even from another room.

Audio detection of smoke detector alarm sounds.

Smoke alarm sound detection can provide early warning of fire emergencies when you're away from home.

Audio detection of carbon monoxide detector alarm sounds.

CO alarm detection can alert you to dangerous gas levels in your home when you're not there to hear the alarm directly.

A Zigbee Coordinator or Controller is the central device that creates and manages a Zigbee network. It starts the network, selects the Zigbee channel, handles security keys, and acts as the main bridge between your hub and all Zigbee devices.

A Thread Border Router is a device that connects your Thread mesh network to your home IP network (Ethernet or Wi-Fi), letting Thread devices communicate with apps, hubs, and the internet. It doesn't control Thread by itself, it acts as the bridge that enables setup, remote access, and cross-network communication.

A Matter Bridge is a device or software component that makes non-Matter devices (like Zigbee, Z-Wave, or proprietary ones) appear and behave like Matter devices. It translates commands and status between the original network and Matter, so you can control those devices from any Matter-compatible platform without replacing the hardware.

Built-in LED lights for illumination and deterrent purposes.

Integrated lighting can improve night vision quality and serve as a visible deterrent to potential intruders.

Global Positioning System for location tracking and geofencing features.

GPS enables location-based automations and helps track portable devices if they're moved or stolen.

Two-way audio communication through the device.

Talk and listen functionality allows you to communicate with visitors or deter intruders remotely.

The ability to define specific areas within the camera's view for motion detection.

Custom motion zones help reduce false alarms by focusing detection on important areas like doorways while ignoring areas like busy streets.

Customizable block zones allow you to exclude specific areas from being recorded.

Built-in loud alarm that can be triggered manually or automatically.

An integrated siren provides an immediate deterrent and can alert neighbors to potential security issues.

The ability to recognize gestures made by the user.

Gestures recognition can be used to control the camera or to interact with the user.

It keeps working, and can be controlled from inside your own network, when the internet is down: over Zigbee, Z-Wave or Thread through a local hub, a native Matter or HomeKit connection, a documented local API or an official local integration.

A product without local control stops answering during an internet outage and depends on the maker's servers staying online.

Every advertised feature works without a paid plan: app control, alerts, history and the smart home integrations.

Some products put video history, monitoring or their integrations behind a monthly plan that can cost more per year than the hardware did.