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Description
Eufy E21 Baby Monitor 4K UHDThe eufy Baby Monitor E21 pairs an Eufy 4K UHD camera with a 5 720p display to help you monitor your baby with clear, detailed viewing. The camera supports a 330 pan and 60 tilt, along with 8 zoom for closer views. You can use hybrid monitoring with or without WiFi connection, and control the monitor through the app and the monitor. It also includes portable camera use with a built in battery, designed for moving the camera around your home or taking
The eufy Baby Monitor E21 pairs an Eufy 4K UHD camera with a 5” 720p display to help you monitor your baby with clear, detailed viewing. The camera supports a 330° pan and 60° tilt, along with 8× zoom for closer views. You can use hybrid monitoring with or without Wi‑Fi connection, and control the monitor through the app and the monitor. It also includes portable camera use with a built-in battery, designed for moving the camera around your home or taking it on trips. With features like ANR and smart alerts, the monitor is built to support attentive monitoring while you’re away from the room. The night vision is described as enabling viewing in the dark, and the monitor includes app support that provides 24/7 recording in the app. The system also supports sharing access with up to 5 family members. For privacy, the monitor includes a switch to cut off Wi‑Fi for a secure, private local connection, using RSA-1024 and AES-128 encryption. Note: SD card is not included, and the product listing indicates MicroSD size options (without MicroSD, 64GB, 128GB).Key Features
• eufy Baby Monitor E21 with 4K UHD camera
• 5” 720p display
• Hybrid Wi‑Fi and no Wi‑Fi connection monitoring
• App and monitor control
• Pan‑Tilt: 330° pan and 60° tilt
• 8× zoom
• Portable camera with built-in battery
• ANR
• Smart Alerts
• Active noise reduction tech to cut background noise by 20 dB
• Alerts you to baby’s cries, room temperature changes, and loud noises
• 24/7 recording in the app
• Night vision for viewing in the dark
• Share access with up to 5 family members
• Plug-in or battery power (travel made easy)
• Toggle switch to cut off Wi‑Fi for secure, private local connection
• RSA-1024 and AES-128 encryption
• Every recording protected with a unique key and saved to your local SD card
• Note: SD card not included
Specifications
• Choose MicroSD size: Without MicroSD, 64GB, 128GB
• Camera pan: 330°
• Camera tilt: 60°
• Zoom: 8×
• Display size: 5”
• Display resolution: 720p
• Battery capacity: 5,000mAh
• Noise reduction: cuts background noise by 20 dB
• Encryption: RSA-1024 and AES-128
• Recording: 24/7 recording in the app
• SD card: saved to your local SD card (SD card not included)
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4.2 ★★★★★
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Product Reviews
★★★★★ 2
Just linear
Format: Paperback
I appreciate that it helps to organize the chaos of information, but I just used the template verbatim with my manager and it did not go very well. He said this linear approach does not work anymore with high-level corporate audiences. They want to cut right to the chase and start to dig into the deep details. This layout with simple images, even if you just pull away the map and anchor slides, makes the storytelling too much like a story, not giving enough credit to the speed at which certain audiences can and do process data on a slide. It was an interesting exercise and I still think this linear layout works in some cases. Just not if you are trying to communicate business case or other C-suite type of information.
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Reviewed in the United States on March 4, 2021
★★★★★ 5
Excellent AI security book
Format: Paperback
A necessary book for those who in work in the AI Security field. It is easy to read and easy to follow along with practice labs. The author did a good job incorporating the breadth of AI threats.
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Reviewed in the United States on January 10, 2026
★★★★★ 5
A good book for Cyber Professionals
Format: Paperback
A very good book, I absolutely love how it gives security professionals much needed AI security insights.
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Reviewed in the United States on January 16, 2026
★★★★★ 5
In-depth and highly technical!
Format: Paperback
"Adversarial AI Attacks, Mitigations, and Defense Strategies" by John Sotiropoulos is a must-have resource for cybersecurity professionals navigating the complexities of AI security.
This book is an incredibly in-depth guide that tackles the intricate details of defending AI systems from adversarial attacks. It’s highly technical, making it an excellent choice for those with a solid background in cybersecurity, machine learning, and system administration. Sotiropoulos doesn’t shy away from the details, providing comprehensive code examples, system admin settings, and scripts that are invaluable for practical implementation.
One of the standout aspects of this book is its coverage of both predictive and generative AI. This dual focus ensures that readers are well-equipped to handle security challenges across different AI applications. Whether you're dealing with machine learning models in a predictive context or exploring the relatively newer field of generative AI, this book has you covered.
If you’re looking for a technical, hands-on approach to securing AI systems, this book is an essential addition to your library.
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Reviewed in the United States on August 12, 2024
★★★★★ 4
Good and thorough!
Format: Paperback
I was amazed to see a thick book arriving in the package and spent quite some time reading this. The book is so hands-on. I build agentic systems at work and going through these concepts felt good. My only complaint is that the code snippets are not up to date for which I had to edit my code several times.
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Reviewed in the United States on May 9, 2026