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Description
Dahua DHI-HY-SA21A-W2(868) AirShield Draadloze RookmelderProductbeschrijving Dahua Wireless Smoke Alarm biedt batterijgevoede rookdetectie en alarmfuncties in n unit. Geavanceerde elektronica in combinatie met een foto elektrische rookdetectiekamer zorgen voor vroege detectie van rook en hoge immuniteit tegen ongewenste alarmen. Dit soort rookmelder heeft geen netvoeding nodig en is geschikt voor algemene residentile toepassingen. Tijdige melding van de rookmelder kan in realtime worden weergegeven op de
Productbeschrijving
Dahua Wireless Smoke Alarm biedt batterijgevoede rookdetectie en alarmfuncties in één unit. Geavanceerde elektronica in combinatie met een foto-elektrische rookdetectiekamer zorgen voor vroege detectie van rook en hoge immuniteit tegen ongewenste alarmen. Dit soort rookmelder heeft geen netvoeding nodig en is geschikt voor algemene residentiële toepassingen. Tijdige melding van de rookmelder kan in realtime worden weergegeven op de DMSS-app.
Specificaties
| Verzamelingstype | Rook |
| Bemonsteringsperiode | 10 seconden |
| Sensor Type | Photoelectric |
| Alarmtype | Rookmelder, storingswaarschuwing, waarschuwing voor lege batterij |
| Alarmvolume | 85dB–90dB(A) op 3 m (9,84 ft) |
| Alarmmodus | Visueel en hoorbaar alarm |
| Stiltefunctie | Ja |
| Stilteduur | Ongeveer 12 min |
| Alarmresponsdrempel | 0,2 dB/m2 - 0,3 dB/m2 |
| Indicatielampje | Rode en groene LED-indicator |
| Led-instructies | Stand-by: Groene indicator knippert eenmaal per minuut Alarm: Rode indicator knippert eenmaal per seconde Storing: Rode indicator knippert eenmaal per minuut Waarschuwing voor lage batterij: rode indicator knippert eenmaal per minuut |
| Dekkingsgebied | Wanneer de hoogte van de ruimte minder dan 8 m (26,25 ft) bedraagt, bedraagt het beschermingsgebied van een apparaat 20 m 2 -40 m 2 |
| Levensduur van de batterij | 3 jaar |
| Bedrijfsspanning | 3V CR123A lithiumbatterij (vervangbaar) |
| Bedrijfsstroom | Bewakingsstroom: ≤ 35uA Alarmstroom: ≤ 35mA |
| Bedrijfsomgeving | Binnen |
| Bedrijfstemperatuur | -10°C tot +55°C (+14°F tot +131°F) |
| Bedrijfsvochtigheid | ≤ 95% RV (niet condenserend) |
| Kleur | Wit |
| Behuizing | ABS |
| Afmetingen | φ98mm × H43,1mm (φ3,85" × H1,70") |
| Gewicht | 140 gram (0,30 pond) |
| Installatie | Plafondmontage |
| Certificeringen | TÜV en CE-gecertificeerd |
| Nalevingsnorm | EN 14604:2005+AC:2008 |
| Draaggolffrequentie | 868 MHz–868,3 MHz |
| Communicatie afstand | Tot 1000 m (3280,84 ft) in een open ruimte |
| Communicatiemechanisme | Tweerichtingsverkeer |
| Frequentieverspringing | Ja |
| Encryptiemodus | AES128 |
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
4.5 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 5
Great no-frills bag. Slim and compact, but still holds plenty.
Size: 17.3 Inch, Style: 1-pack
I needed a case for my new HP Pavilion 17" laptop.
I didn't need anything fancy or with all kinds of special features. I didn't need one with a lot of extra storage space beyond what was required for the laptop, its power adapter and cord, and a small mouse. And above all I didn't want one with a large, bulky profile, one that would feel like I was carrying--or rolling--a small suitcase.
Turns out this AmazonBasics bag was just what I was looking for.
It is indeed slim and compact, and it's lightweight to boot (only weighing about 1 lb.). And even when it's filled to the brim and weighs a good bit more, it STILL looks slim and compact.
For its economical price point, it is constructed very well, and thus should be quite durable for light to moderate use. The stitching is very tight and clean, with even strong, "zipper-stay" stitching being included on this inexpensive bag. The zippers themselves (which I tend to be picky about) are of very good quality, and open and close without much effort. The zipper pulls are ample in size and weight, and are very strong and sturdy. In other words, they're NOT cheap.
I appreciate the case's simple yet thoughtful design. I especially like the single, large, zippered pocket on the front "face" of the bag, where you can easily and conveniently keep oft-used items such as your phone, keys, power bank, and so forth. Too many laptop bags' outside pockets are unzippered, which I find both impractical and unsafe.
The AmazonBasics bag holds my laptop snugly and securely, yet I can still manage to squeeze in extra padding (about 3/8" thick and 1.5" wide) all around its perimeter. I do this because the case provides only the most minimal of padding throughout. (Mind you, I wouldn't have expected sufficiently thick padding on a bargain bag such as this one, but it's worth bringing attention to nonetheless.) The upshot here is that, as well constructed as this case is, it's not designed to protect our laptops from accidental drops onto hard surfaces. There simply isn't enough shock-absorbing padding.
But frankly I'm not that worried about accidental drops. Rather, for my most pressing general needs--storing or transporting my laptop and keeping it free from dust, scratches, dents and the like--this AmazonBasics bag really fits the bill. It's easy to carry, and it's easy (and quick) to access your laptop.
I'm VERY happy with it, would buy another one without hesitation, and I highly recommend it!
Finally, my goal as a reviewer is always to try and help others make better informed decisions about potential Amazon products they may be considering. Toward that end, I hope in some small way that you may have found this helpful. Thanks for reading my review. Best of luck with your shopping!
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Reviewed in the United States on October 16, 2016
★★★★★ 4
Love this bag.
Size: 15.6 Inch, Style: 1-pack
I love this bag. It was affordable, and it has plenty of compartments to store my cords and portable drives. It is fun to be able to get work done at coffee shops and theme parks etc...
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Reviewed in the United States on May 5, 2026
★★★★★ 5
For 12.4 tablet with hard case on
Size: 14 Inch, Style: 1-pack
I got this black carrying case for my tablet and it fits well inside and you have room still if you want to carry like cables or some documents and stuff. Now only thing I wish that it was better was inside padding but for the price it is still decent as I have a case on my tablet and hard one for the matter so I just needed carry bag to carry around and it would be fine for me for anyone else think it thru as padding is not very protective inside but other then that nice quality bag and feels sturdy
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Reviewed in the United States on June 5, 2026
★★★★★ 5
Easy to carry
Size: 15.6 Inch, Style: 1-pack
Spacious, lightweight, and easy to carry. Good quality and great value for the price.
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Great Budget Laptop Bag / Sleeve
Size: 14 Inch, Style: 1-pack
I got this bag to use as a laptop sleeve in my backpack, because I honestly don't trust cheap stuff on amazon anymore, so I got something that would likely be more sturdy, a bag instead of a sleeve. Protection is decent and the zippers, material, construction, and overall feel, don't come off as cheap at all. There could be a bit more padding, but for the quality of bag I got for the price, it's a steal. There's an outside compartment, with folder like flaps inside, where you can use this bag as a folder too. 4.5/5 product and wish there was more padding pro protection
Strap is removeable to use which is nice for carrying like a suit case, or using as a sleeve in a bag
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Reviewed in the United States on February 18, 2026