Kidde Battery Operated Smoke and Carbon Monoxide Combination Detector with Voice Alarm and Ionization Sensor - KN-COSM-B / KN-COSM-BA

The best thing about this unit is that combines two safety devices in a single unit: a smoke alarm and a carbon monoxide detector.
It also comes with a voice alarm that will alert you and your family in the event of a fire. With this unit, you can rest assured that your family can respond quickly when hazards are present.
The folks over a Kidde have been developing fire detection tech since 1917. They know what they’re doing.
It’s your job as a responsible homeowner to take the necessary precautions against fire hazards. It’ll be a piece of cake with this smoke alarm.
It’s very easy to install and has a ton of features you can count on. Plus, it’s a small price to pay for safety. After all, that should be at the top of your priorities.

These are the features of this model:

• Ionization sensor 

This is how this model detects an increase in carbon monoxide in the air. It’s essentially a very small amount of radioactive material sandwiched between two electrically charged plates. These components will create ionized air around the device. Now, a fire would typically lead to more carbon monoxide in the air. This will disturb the ionized air around the device and trigger the alarm.

• Voice alarm

Instead of a blaring noise that would cause a lot of panic, this model has a voice alarm that announces any type of hazard detected. It will say, “Fire!” when there is a smoke hazard and “Warning, carbon monoxide” when CO is in the air.

• Hush feature 

This allows the user to temporarily mute the alarm. Really, all a person needs is the notification to correct the hazard.

• Easy installation

This model is very easy to install in all rooms of the house. You really need more smoke alarms than you’d think.

• Photoelectric sensor 

This is how this model detects smoldering fires (fires that burn slowly and creates more smoke). It’s very light-sensitive. So when the presence of smoke scatters the light in the alarm’s chamber, this triggers the alarm.

• Low battery warning 

Alerts you if the battery needs replacing.

• Test/Reset button 

Lets you test if the unit’s circuitry is still in good condition.

• Battery powered 

Keeps you protected even during power outages.

• Battery safeguard 

You will not be able to close the battery door if the batteries are not installed correctly.

• LEDs

The unit flashes green if it’s working normally and red if it’s in alarm mode.