Pay in installments of $10.24 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 19 - Jul 24
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
A81U-ZS 5 in 1 8 Channel Dual Stream H.264 1080N AHD DVR, Support AHD / TVI / CVI / CVBS / IP Signal, A81U-ZS1. Support: AHD TVI CVI CVBS IP five signals 2. Step on the Internet: With cloud service, easy to achieve a variety of network penetrations, one step to remote monitoring, getting rid of various complicated network settings, easy and simple to operate. 3. Compression algorithm ideal: H. 264 compression algorithm, 30% decrease of stream due to advanced space time filtering technology. 4. Playback quality: Support full real time encoding video, full
1. Support: AHD/TVI/CVI/CVBS/IP five signals2. Step on the Internet: With cloud service, easy to achieve a variety of network penetrations, one step to remote monitoring, getting rid of various complicated network settings, easy and simple to operate.
3. Compression algorithm ideal: H.264 compression algorithm, 30% decrease of stream due to advanced space-time filtering technology.
4. Playback quality: Support full real-time encoding video, full real-time playback of multi-channel synchronous decoding.
5. Main and Sub Stream: Main stream and Sub-stream encoding. Main stream for local storage, ensure image quality; Sub-stream for real-time network transmission, easy to solve bandwidth bottleneck problem.
6. Mobile monitor: Support various mobile monitoring(iPhone, Windows Mobile, BlackBerry, Symbian, Android).
7. Display: VGA HD output simultaneously, support VGA 1080p HD output, lead the technology of HD resolution.
8. Operation interface: Similar to Windows operating style, easy to get started with powerful mouse right-click function.
9. Network: Powerful network services (support DHCP, PPPOE, FTP, DNS, DDNS, EMAIL, IP searches etc.) And perfect support (WEB, Client, SDK), easy to achieve interoperability.
10. Browsers: Support IE, Chrome, Firefox, Safari browsers.
11. Remote Access: With DNS (ARSP), easy to monitor remotely, 3322 (Greek network), dyndns, oray (peanut shells), myq-see and other DNS are also provided.
12. Differentiation: Boot screen free replacement, more than twenty languages, over 10 sets of GUI interface, ten kinds of remote control, which make our products different from others.
13. Others: With unique black box technology, the whole process can be monitored, which greatly reduces maintenance costs.
14. Encode capability: 8*1080N @25fqs P/ 30fqs.
15. Decode capability: 4*1080N @18fqs P/18fqs.
16. Multi-Input (ONVIF 2.8) Analogue: 8*1080N, Analogue + Network; HD: 4*1080N(AHD-NH)+7*720P(network), Network: 4*720P.
17. CPU Master: GM8286; DDR memory: 1*2G; AD chip: NVP6114A; Flash: W25Q128.
18. Space usage video: 1080N: 25G/day*channel, 720P: 20G/day*channel, 960H: 12-20G/day*channel, audio 691.2M/day*channel.
Specification:
| Media Format |
|
| NVR |
|
| Dimensions |
|
| Package Include |
|
| Package Weight |
|
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 22 reviews
Sort
Product Reviews
★★★★★ 5
Conquer AI Agent complexity with this comprehensive guidebook
Format: Kindle
This book delivers incredibly comprehensive coverage of AI Agents and their various components -- designing, creating, building, deploying with LLMs, RAG, Knowledge Graphs, and ML models (Deep Learning, Reinforcement Learning). And more!
Disclosure: the publisher provided me with a free review copy of the book.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 24, 2025
★★★★★ 5
good book for beginners in Python and in simulation
Format: Kindle
Author made very short and simple intro into Python to jump into many different code examples to show how to solve them and to visualize results in Python. Reader will learn how to use Python libraries for modeling and simulation. Each example has an analytical solution and numerical with Python and visualization tools
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 2, 2026
★★★★★ 5
would highly recommend
Format: Paperback
well written even a newbie can follow
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2025
★★★★★ 5
great book
Format: Paperback
perfect for beginners
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 22, 2024
★★★★★ 2
Don't buy, check HIS github or google collab for EVERYTHING that's in this book. NO SOLUTION
Format: Paperback
I never write reviews, but after this book I need to. DON'T BUY IT. DO NOT BUY THIS BOOK. Feels like a money grab. You are literally paying money for NOTHING buying this book. Long story short: GO TO HIS GITHUB AND GET IT ALL FOR FREE BECAUSE HE DOES NOT PROVIDE SOLUTIONS. GO ON GITHUB OR GOOGLE COLLAB AND CALL IT A DAY.
In the intro he makes it seem like you don't need to know much programming or any tbh. He says if you have never programmed you should be able to read this book. HELL NO, I mean yeah you could probably figure it out, but I would not let someone that doesn't know any programming to start with this. I'd probably tell you to learn the basics of python for a week before starting at the very least.
He also makes it seem like you don't need much knowledge of physics. Meh, maybe.
Anyway the main reason not to buy: IT'S ALL AVAILABLE FOR FREE ON GITHUB THAT HE PUBLISHES FOR FREEEEEE. You can also use google collab, which he has up for FREEE. and if you are are a beginner I'd recommend you go off teh google collab, that way you don't have to deal with downloading anaconda and setting up an enviroment in jupyter which I think can be intimidating for a beginner. And this book doesn't really give much help in setting up everything in jupyter notebook.
Also another point. He'll lead you through an example each lesson, but for the exercises he has you working on he doesn't provide a solution ANYWHERE. like why tf would you buy this book? How do you expect to learn with no feedback? You need to search online for ways to solve these problems, which I think is not a bad skill to have, but if you are new to a subject or trying to learn and you pay for a book why can't i at the very least get some solutions. even math textbook give you solutions, because the understanding is that you can make your own attempt and CHECK TO SEE IF YOU ARE RIGHT. DUHH !
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 8, 2026