Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 13 - Jul 18
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Description
Hardwired Interconnected Photoelectric Smoke Alarm, Ceiling Mount, ADA Strobe with Battery BackupThe Gentex 7139CS C is a photoelectric smoke alarm designed for residential and commercial residential applications, including homes, apartments, hospitals and hotels motels. The 7139CS C is designed to give reliable early warning of the presence of smoke where both audible and visual alarms are required. The 7139CS C is ANSI UL 217 and ANSI UL 1971 listed and is compliant with IBC IFC Standards as well as NFPA 72. California residents see Prop 65
The Gentex 7139CS-C is a photoelectric smoke alarm designed for residential and commercial residential applications, including homes, apartments, hospitals and hotels/motels. The 7139CS-C is designed to give reliable early warning of the presence of smoke where both audible and visual alarms are required. The 7139CS-C is ANSI/UL 217 and ANSI/UL 1971 listed and is compliant with IBC/IFC Standards as well as NFPA 72.- California residents
- 120 VAC with 9VDC battery back-up
- 90dBA temporal 3 evacuation piezo horn with a 3100Hz (nominal) horn frequency
- ADA compliant 177 candela strobe (ANSI/UL 1971)
- Ceiling mount
- On-site washing program
- Nominal 2.5% sensitivity
- 3 position test switch
- Form C contact included
- Tandem interconnect with all Gentex tandem capable alarms
- Low or missing battery indicator
- Relays operate on battery back-up and will activate from tandem wire
- Quick disconnect wiring harness
- Fully insect screened
- 1 year warranty from date of purchase
Features
| Item Weight | 1.75 |
| Commercial/Residential | Commercial,Residential |
| Voltage (volts) | 120 |
| Fixed or portable | Fixed |
| Connector/Contact Type | 4-Wire |
| Alarm Type | Smoke |
| Alarm/Detector Features | Battery Back-Up,Interconnected,Strobe Light,Tamper Resistant |
| Pack Size | 1 |
| Power Source | Hardwired |
| Returnable | 180-Day |
| Alarm Sensor Type | Photoelectric |
| Included | Batteries,Battery Back-Up |
| Product Height (in.) | 5.5 |
| Product Depth (in.) | 4.75 |
| Product Width (in.) | 5.5 |
| Certifications and Listings | UL Listed |
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
4.8 ★★★★★
Based on 2103 reviews
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Product Reviews
★★★★★ 5
Light weight, and high quality!
Size: 17" (2 x 4.0Ah)
I had concerns when we got this mower. It isn’t self propelled, and is smaller than our last one, but it really surprised me. We have a lot of yard, and are on a hill, which added to our concerns.
It is lightweight, which makes it really easy to use. You can raise and lower the deck with a couple of fingers. It even goes up the hill easily.
The only downside is the battery life. It comes with 2 24v batteries, and needs both to operate. They last about 30 min. My thought was to get a second set of batteries, but they cost as much as another mower.
I like the easy maintenance, and light weight, and that it has power and is quiet. Great mower.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2025
★★★★★ 5
Great electric mower for the price
Size: 17" (2 x 4.0Ah)
This was one of my favorite purchases this year. The November isn't noisy, looks much better than my previous electric lawnmower, and was surprisingly powerful for what it was. Out of the box, it was super easy to set up. My only gripe is that I wish the batteries would last a little longer. Currently, it lasts about 45 min per charge.
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Reviewed in the United States on November 22, 2025
★★★★★ 3
Lawnmower
Size: 17" (2 x 4.0Ah)
Bought this and two extra batteries. One battery turned out to be bad and won't charge. The lawnmower so far is great. Cuts good and very lightweight. Would recommend it, the batteries not so much.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
It actually does the job pretty well
Style: Lawn Edger/Tool Only
I floundered around for a few minutes, then figured out how to use it, and then made pretty good progress on my overgrown sidewalks. Yes, it uses up batteries but that's because it actually has enough power to do the job, unlike many "homeowner" tools. The handle is long enough so I'm not painfully bent over while using the tool, and it feels solid and stable. One thing I really appreciated is that it doesn't have a typical pointless, awkward "safety" interlock button that you're supposed to keep mashed down with your thumb the whole time - it's a comfortable one-finger trigger.
Another good 20v tool from Worx. I'm "in".
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Reviewed in the United States on June 10, 2024
★★★★★ 5
Quit spinning
Style: Lawn Edger/Tool Only
Worked great until it guilt working.
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Reviewed in the United States on November 14, 2025
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