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- USA
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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Description
CentralAlert Door Knock Sensor Model CA-DXInstall device on existing door chime or intercom door announcer for vibration detection. When someone rings your door bell, it detects vibration and sends a wireless signal to trigger the CA 360 to alert. Or, you can attach the CA DX to the inside surface of your door to detect the knocking on your door. Product Features: Detects vibration form existing doorbell or door chime and sends signal to CA 360 when someone is at the door Attach to or place
Install device on existing door chime or intercom door announcer for vibration detection. When someone rings your door bell, it detects vibration and sends a wireless signal to trigger the CA-360 to alert. Or, you can attach the CA-DX to the inside surface of your door to detect the knocking on your door.
Product Features:
- Detects vibration form existing doorbell or door chime and sends signal to CA-360 when someone is at the door
- Attach to or place near existing doorbell or door intercom
- 2.5mm jack for direct connection to doorbell terminal
- Optional door-knob hanger for hotel kit
- Sensitivity adjustment
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
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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
4.1 ★★★★★
Based on 1077 reviews
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Product Reviews
★★★★★ 5
A top-tier gaming monitor that exceeds expectations in every way!
Size: 27"
The SAMSUNG 27" Odyssey G65B is hands down one of the best gaming monitors I’ve ever owned. If there were an option to give more than 5 stars, this product would absolutely earn 7! From its stunning QHD resolution to the ultra-smooth 240Hz refresh rate, this monitor has redefined my gaming experience.
First, let’s talk about the display quality. The QHD resolution combined with HDR 600 creates incredibly vibrant and lifelike visuals. Colors are rich, blacks are deep, and the contrast is outstanding. Whether I’m playing fast-paced shooters or exploring immersive RPG worlds, the level of detail and clarity is second to none. The 1000R curve pulls you into the action, making gameplay more immersive and natural for your field of vision. After hours of gaming, I experienced less eye strain compared to flat monitors, which is a huge plus.
The 240Hz refresh rate and 1ms response time (GTG) make this monitor a dream for competitive gaming. The responsiveness is flawless, and I noticed an immediate improvement in how fluid gameplay feels. There’s no ghosting, screen tearing, or input lag, even in the most intense gaming sessions. It’s perfect for FPS games like Call of Duty or Valorant, where every millisecond counts.
One of the standout features is the built-in Gaming Hub. I was able to stream games directly without even needing my PC or console turned on—a convenience I didn’t realize I needed until now. The user interface is intuitive, and the hub is packed with options, making this monitor as versatile as it is powerful.
Another fantastic addition is the array of connectivity options. With multiple HDMI and DisplayPort inputs, along with USB ports, this monitor can handle all your devices with ease. I have it connected to my PC, PS5, and even a streaming device, and switching between them is seamless.
Build quality is excellent, with a premium feel that matches the performance. The monitor stand is sturdy and highly adjustable, allowing you to tilt, swivel, and height-adjust to find the perfect viewing angle. The sleek design and thin bezels add a modern touch to any gaming setup.
Setting it up was a breeze. The box was well-packaged, and the monitor itself was easy to assemble. Samsung’s attention to detail is evident even in the setup process. Delivery was also smooth and timely, ensuring everything arrived in perfect condition.
In conclusion, the Samsung Odyssey G65B is a masterpiece of gaming technology. It checks every box for gamers—stunning visuals, exceptional performance, and advanced features. It’s worth every penny and then some. If you’re serious about gaming, this monitor will elevate your experience to an entirely new level. I cannot recommend it highly enough!
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Reviewed in the United States on December 5, 2024
★★★★★ 5
Absolutely great curved monitor for his PC. Samsung, top of the line can't go wrong!
Size: 32"
Bought this for my son's birthday / Christmas present because they are so close together. I think it was only about three or $400. But it is the Samsung which is a top rate item. And it has a curved screen for better viewing. That's what he wanted so that's what he got! LOL he said it works greatly and you can adjust so many settings such as the brightness the sound and everything else. Good size too! 32 inches that's like a TV screen LOL
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Reviewed in the United States on April 3, 2026
★★★★★ 1
Worst interface on the market. A sadist designed it.
Size: 32"
Great screen. The absolute worst interface in the business. Who in their right mind would want their monitor to change inputs on a whim? Who would design a 6 step process to change that input back? Samsung did. I wish I had spent my hard earned money elsewhere. I waste more time fixing this stupid monitor then I do enjoying the games I play on it. It's nightmare fuel.
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Reviewed in the United States on May 15, 2026
★★★★★ 4
Smart Features Overkill (for me)
Size: 32"
This monitor arrived promptly and undamaged. The picture quality is excellent, and the refresh rate has my games looking silky-smooth. If it was a normal monitor without smart features, I would give it 5 stars.
The smart capabilities make this somewhat obnoxious from time to time. I just had an update (that prompted this review) that had a pop-up box telling me Samsung policies have been updated, but I was unable to dismiss it with my mouse or keyboard. I had to wait for it to time out or use the remote. There are also countdown screens during boot-up and shut-down that can be annoying at times, though to be fair, I have not attempted to disable them. It also occasionally just likes to pop up notifications that aren't from my computer about input or monitor settings (not pc display settings). It's really a pretty small nuisance, but after a few months sometimes has me wishing I had just dropped the cash on a nicer 4k monitor w/out smart capabilities.
I would imagine it being quite convenient in a dorm or small apartment setting if you were also using it as a smart tv on a regular basis. Not a bad product by any means, just a few extra bells and whistles that occasionally get in the way of how I typically use it. I picked it up on sale for right around $400 and feel that was fair. If I had to pay more, I would probably make the jump to 4k and shop at that higher price point instead.
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Reviewed in the United States on July 24, 2025
★★★★★ 5
Its a TV too!
Size: 32"
I got this monitor for my computer for the most part.
Excellent quality
Colors are great, no dead pixels on arrival. Bright and easy to see.
Comes with a remote which I thought was strange and put it aside for a few months.
Then when I found the remote again I played with it and realized this was also a TV!!
So for the price it is an amazing gaming monitor and a smart tv on top of that this is great value for the money.
The curve may make it difficult to see as a tv if you are in a large space but for what it is made for there is no problem at all. And you can adjust if you do move around the room.
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Reviewed in the United States on October 21, 2025