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Ships within 48 hours · Estimated delivery Jul 25 - Jul 30
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Description
GL09 4G Version 8 Channel GSM Alarm Security System Module, GL09 4G1. Multi band support: DC 5V 16V power input, 8 alarm detection channels, users can set different content for each alarm information channel. You can choose the alarm input port as NC or NO. 2. The built in 4G module can work anywhere in the world through 4G, 3G and GSM networks. 3. Easy to operate and use: We have customized an app that supports iOS Android systems, and you can set it up just by sending a text message through the app. 4. Multiple
1. Multi-band support: DC 5V-16V power input, 8 alarm detection channels, users can set different content for each alarm information channel. You can choose the alarm input port as NC or NO. 2. The built-in 4G module can work anywhere in the world through 4G, 3G and GSM networks.
3. Easy to operate and use: We have customized an app that supports iOS/Android systems, and you can set it up just by sending a text message through the app.
4. Multiple groups of numbers can be set: up to 6 groups of called numbers can be set. When the alarm input has a trigger signal, the alarm information will be sent to the alarm number, and the alarm number can also be dialed directly.
5. Low voltage alarm function: low power sleep mode design, real-time detection of battery voltage and low voltage alarm, suitable for battery-powered applications.
6. Short circuit alarm: input is switch signal. When the input port is short-circuited with the ground (GND), an alarm message will be sent to the preset mobile phone or the set alarm number will be dialed. The content of the alarm message can be determined by you 7. This product can be powered by DC power supply or by battery (battery not included)
Specification:
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Exchange/Return Notes
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4.7 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 5
Traditional Grown Man Shirt
Size: Large, Color: Light Grey Vertical Stripe
Great cotton, classically-style button down shirt for guys not wanting anything slim fit, this shirt size is legitimate. It’s a nice heavyweight cotton shirt. I don’t think I’d say it was wrinkle resistant but it doesn’t take much effort to press this garment.
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Reviewed in the United States on January 20, 2026
★★★★★ 5
Softer and Larger than Expected
I was a bit wary of this shirt because I had only purchased 100% cotton ones in the past. My first impression out of the package was how soft the material felt. I was very impressed because it usually takes many washings before oxford cloth shirts get that soft. When I put it on, I discovered that there was no noticeable difference made with the small amount of stretch fabric woven into the shirt. I suspect that there would be some give if I wore the shirt as a tight fit, but I prefer my shirts loose, so it wasn't an issue.
I found that the shirt was larger than other same sized shirts I've received from Amazon in the past--bigger is better than smaller, but if you are looking for a close fit, you will want to be conservative in the size you order. I didn't realize until I'd been wearing it for a while that it lacks a pocket, I went to put my glasses in my shirt pocket and there wasn't one!
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Reviewed in the United States on November 30, 2023
★★★★★ 5
Excellent
Size: 8, Color: Black
Excellent product
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Reviewed in the United States on January 17, 2026
★★★★★ 5
Great shoes
Size: 10.5, Color: White
These are a great pair of sneakers that work both as casual sneakers and for dressier occasions. They are incredibly comfortable too.
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Reviewed in the United States on November 22, 2025
★★★★★ 4
Great !
Size: 10.5, Color: Black
Orginal and comfortable shoes.
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Reviewed in the United States on October 22, 2025