Best CO Smoke Detector Combos Updated May 2026
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Best CO Smoke Detector Combos
2026 Buyer's GuideUpdated May 2026
Advertiser disclosure About our rankings
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Best CO Smoke Detector Combo
1

10.0

Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 2 Pack
Detects: Smoke & carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
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1K+ bought in past month
Best CO Smoke Detector Combo

10.0

1
Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 2 Pack
Detects: Smoke & carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
1K+ bought in past month
Compare
Read Full Review
2

9.8

First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack
Detects: Smoke & carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
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9.8

2
First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack
Detects: Smoke & carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
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3

9.5

Kidde Smoke and Carbon Monoxide Detector, 10-Year Battery Powered, LED Status Lights, 85 dB Alarm, 5-inches, 30CUD10, 2 Pack
Detects: Smoke & carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
Compare

9.5

3
Kidde Smoke and Carbon Monoxide Detector, 10-Year Battery Powered, LED Status Lights, 85 dB Alarm, 5-inches, 30CUD10, 2 Pack
Detects: Smoke & carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
Compare
4

9.3

Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, LED Status Lights, Interconnected, 85 dB Alarm...
Detects: Smoke & carbon monoxide
Alarm: 85 dB
Interconnects: Yes
Wi-Fi Enabled: No
Power Source: Hardwired
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-7%
Compare

9.3

4
Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, LED Status Lights, Interconnected, 85 dB Alarm...
Detects: Smoke & carbon monoxide
Alarm: 85 dB
Interconnects: Yes
Wi-Fi Enabled: No
Power Source: Hardwired
-7%
Compare
Read Full Review
Premium Pick
5

9.2

First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup - 3 Pack
Replacement
Installation
-12%
Premium Pick

9.2

5
First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup - 3 Pack
Replacement
Installation
-12%
6

9.0

Kidde Smoke and Carbon Monoxide Detector, 10-Year Battery Powered, LED Status Lights, 85 dB Alarm, 5-inches, 30CUD10, 1 Pack
Detects: Smoke & carbon monoxide
Alarm: 85 dB, LED light
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
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9.0

6
Kidde Smoke and Carbon Monoxide Detector, 10-Year Battery Powered, LED Status Lights, 85 dB Alarm, 5-inches, 30CUD10, 1 Pack
Detects: Smoke & carbon monoxide
Alarm: 85 dB, LED light
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
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7

8.8

First Alert BRK Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMICO100, 1-Pa...
Ease of installation
Functionality

8.8

7
First Alert BRK Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMICO100, 1-Pa...
Ease of installation
Functionality
Popular
8

8.7

First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack
Detects: Smoke & carbon monoxide
Alarm: 85 dB
Interconnects: Yes
Wi-Fi Enabled: No
Power Source: Hardwired with battery backup
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-23%
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Popular

8.7

8
First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack
Detects: Smoke & carbon monoxide
Alarm: 85 dB
Interconnects: Yes
Wi-Fi Enabled: No
Power Source: Hardwired with battery backup
-23%
Compare
Read Full Review
9

8.5

Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 1 Pack
Detects: Smoke & carbon monoxide
Alarm: 85 dB & LED flash
Interconnects: Yes
Wi-Fi Enabled: No
Power Source: Battery
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8.5

9
Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 1 Pack
Detects: Smoke & carbon monoxide
Alarm: 85 dB & LED flash
Interconnects: Yes
Wi-Fi Enabled: No
Power Source: Battery
Compare
Read Full Review
Best Value
10

8.4

Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
Detects: Carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
-7%
Compare
Best Value

8.4

10
Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
Detects: Carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
-7%
Compare
We also considered 6 others:

Our Top Choice

Best CO Smoke Detector Combo
1

10.0

Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 2 Pack
Detects: Smoke & carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
Read Full Review
Compare
1K+ bought in past month
Best CO Smoke Detector Combo

10.0

1
Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 2 Pack
Detects: Smoke & carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
1K+ bought in past month
Compare
Read Full Review

Compare Features

Interconnects
Best CO Smoke Detector Combo
1. Kidde Smoke & Carbon Monoxide Detector (2 Pack)
KIDDE Preview KIDDE Preview
KIDDE
at Amazon
2. First Alert SMCO210 Smoke & CO Alarm
FIRST ALERT Preview FIRST ALERT Preview
FIRST ALERT
at Amazon
3. Kidde Smoke & Carbon Monoxide Detector (2 Pack)
KIDDE Preview KIDDE Preview
KIDDE
at Amazon
4. Kidde Hardwired Smoke & Carbon Monoxide Detector
KIDDE Preview KIDDE Preview
KIDDE
at Amazon
Premium Pick
5. First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup - 3 Pack
FIRST ALERT Preview FIRST ALERT Preview
FIRST ALERT
at Amazon
6. Kidde Smoke & Carbon Monoxide Detector
KIDDE Preview KIDDE Preview
KIDDE
at Amazon
7. First Alert BRK Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMICO100, 1-Pa...
FIRST ALERT Preview FIRST ALERT Preview
FIRST ALERT
at Amazon
Popular
8. First Alert SMICO100-AC Smoke & Carbon Monoxide Alarm
FIRST ALERT Preview FIRST ALERT Preview
FIRST ALERT
at Amazon
9. Kidde Smoke & Carbon Monoxide Detector
KIDDE Preview KIDDE Preview
KIDDE
at Amazon
Best Value
10. Kidde 21008873 Monoxide Alarm
KIDDE Preview KIDDE Preview
KIDDE
at Amazon
Deal
— — — -7% -12% — — -23% — -7%
Deal — — — -7% -12% — — -23% — -7%
Detects
Smoke & carbon monoxide Smoke & carbon monoxide Smoke & carbon monoxide Smoke & carbon monoxide Smoke & carbon monoxide Smoke & carbon monoxide Smoke & carbon monoxide Carbon monoxide
Detects 		Smoke & carbon monoxide Smoke & carbon monoxide Smoke & carbon monoxide Smoke & carbon monoxide Smoke & carbon monoxide Smoke & carbon monoxide Smoke & carbon monoxide Carbon monoxide
Alarm
85 dB 85 dB 85 dB 85 dB 85 dB, LED light 85 dB 85 dB & LED flash 85 dB
Alarm 		85 dB 85 dB 85 dB 85 dB 85 dB, LED light 85 dB 85 dB & LED flash 85 dB
Interconnects
No No No Yes No Yes Yes No
Interconnects 		No No No Yes No Yes Yes No
Wi-Fi Enabled
No No No No No No No No
Wi-Fi Enabled 		No No No No No No No No
Power Source
Battery Battery Battery Hardwired Battery Hardwired with battery backup Battery Battery
Power Source 		Battery Battery Battery Hardwired Battery Hardwired with battery backup Battery Battery

Related Categories
Combined Smoke and Carbon Monoxide AlarmSmoke Detector & Carbon Monoxide Detector ComboSmoke Alarm and Carbon Monoxide Detector
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Related Categories
Combined Smoke and Carbon Monoxide AlarmSmoke Detector & Carbon Monoxide Detector ComboSmoke Alarm and Carbon Monoxide Detector
Related Categories
Combined Smoke and Carbon Monoxide AlarmSmoke Detector & Carbon Monoxide Detector ComboSmoke Alarm and Carbon Monoxide Detector