If this alarm goes off will my other alarms go off?
Yes, this Kidde smoke & CO detector interconnects with up to 18 Kidde detectors total (smoke, CO, smoke/CO, or heat) per NFPA interconnect limit.
Can I use adhesive strips to attach to the ceiling?
No, adhesive strips are not recommended for installation. Mounting bracket and screws are included for your convenience.
If the alarm goes off, how can I tell whether it's due to smoke or carbon monoxide?
The smoke alarm sound is three long beeps, a 1.5 second pause, and 3 long beeps repeating. The CO alarm is four quick beeps repeating every 5 seconds.
Is this detector UL certified?
Yes, the Kidde smoke & carbon monoxide combination detector has passed strict testing standards to meet UL 217 and UL 2034 standards.
Smoke & Combo Detector Comparison Chart
 Hardwired Combo + Voice |  Hardwired Combo Alarm |  Battery Combo Alarm |  Battery Combo + Voice |  Smart Smoke Alarm | |
|---|---|---|---|---|---|
Customer Reviews | — | — | — | — | — |
Price | — | — | — | — | — |
Detection Type | Smoke & Carbon Monoxide | Smoke & Carbon Monoxide | Smoke & Carbon Monoxide | Smoke & Carbon Monoxide | Smoke |
Power Source | Hardwired; 2 AA Battery Backup | Hardwired; 2 AA Battery Backup | 2 AA Batteries (Included) | 2 AA Batteries (Included) | Hardwired;10-Yr Battery Backup |
Voice Alerts | ? | — | — | ? | ? |
Interconnect Capability | ? | ? | ? | ? | ? |
Sensor Type | Photoelectric | Photoelectric | Photoelectric | Photoelectric | Photoelectric |
Low Battery Warning | ? | ? | ? | ? | ? |
LED Light Indicator | ? | ? | ? | ? | ? |
Test & Hush | ? | ? | ? | ? | ? |
Connects to WiFi | — | — | — | — | ? |
Real-Time App Notifications | — | — | — | — | ? |
Free App for iOS or Android | — | — | — | — | ? |
UL Listed | ? | ? | ? | ? | ? |
Detects Smoke & CO
2 units in 1: alerting you to both smoke & carbon monoxide using a single alarm.
Hardwired
120V AC/DC Hardwired with AA backup batteries help you stay protected during a power outage
UL Listed
Comprehensively Tested by UL.
Voice Alerts
Announces "Warning Carbon Monoxide" when CO is present or "Fire!" when smoke is present to help you seek safety.
Hush
Easily test and Hush alarms with the push of a button.
Self-Testing
Equipped with internal, self-testing components that are always checking to ensure the device is operating as expected, giving you peace of mind.*
If this alarm goes off will my other alarms go off?
Yes, this Kidde smoke & CO detector interconnects with up to 18 Kidde detectors total (smoke, CO, smoke/CO, or heat) per NFPA interconnect limit.
Can I use adhesive strips to attach to the ceiling?
No, adhesive strips are not recommended for installation. Mounting bracket and screws are included for your convenience.
If the alarm goes off, how can I tell whether it's due to smoke or carbon monoxide?
The smoke alarm sound is three long beeps, a 1.5 second pause, and 3 long beeps repeating. The CO alarm is four quick beeps repeating every 5 seconds.
Is this detector UL certified?
Yes, the Kidde smoke & carbon monoxide combination detector has passed strict testing standards to meet UL 217 and UL 2034 standards.
Smoke & Combo Detector Comparison Chart
Hardwired Combo + Voice | Hardwired Combo Alarm | Battery Combo Alarm | Battery Combo + Voice | Smart Smoke Alarm |
|---|---|---|---|---|
| Customer Reviews | ||||
| — | — | — | — | — |
| Price | ||||
| — | — | — | — | — |
| Detection Type | ||||
| Smoke & Carbon Monoxide | Smoke & Carbon Monoxide | Smoke & Carbon Monoxide | Smoke & Carbon Monoxide | Smoke |
| Power Source | ||||
| Hardwired; 2 AA Battery Backup | Hardwired; 2 AA Battery Backup | 2 AA Batteries (Included) | 2 AA Batteries (Included) | Hardwired;10-Yr Battery Backup |
| Voice Alerts | ||||
| ? | — | — | ? | ? |
| Interconnect Capability | ||||
| ? | ? | ? | ? | ? |
| Sensor Type | ||||
| Photoelectric | Photoelectric | Photoelectric | Photoelectric | Photoelectric |
| Low Battery Warning | ||||
| ? | ? | ? | ? | ? |
| LED Light Indicator | ||||
| ? | ? | ? | ? | ? |
| Test & Hush | ||||
| ? | ? | ? | ? | ? |
| Connects to WiFi | ||||
| — | — | — | — | ? |
| Real-Time App Notifications | ||||
| — | — | — | — | ? |
| Free App for iOS or Android | ||||
| — | — | — | — | ? |
| UL Listed | ||||
| ? | ? | ? | ? | ? |