Skip to product information
1 of 5
In Store Only IN-STORE ONLY

First Alert 3V Electrochemical Digital Carbon Monoxide Alarm

First Alert 3V Electrochemical Digital Carbon Monoxide Alarm

SKU: SKU: 520840

Shop All First alert
Regular price $34.97
Reliable 3V carbon monoxide alarm with digital display and long-lasting battery power.
only 4 left in stock
First Alert 3V Electrochemical Digital Carbon Monoxide Alarm is designed to provide reliable and consistent monitoring of carbon monoxide levels in your home. This battery-operated alarm features advanced electrochemical sensors that accurately detect dangerous carbon monoxide threats. The easy-to-read backlit digital display allows you to quickly see both current and peak CO levels, ensuring you stay informed at all times. Powered by two replaceable AA batteries, it continues to function even during power outages, giving you peace of mind. Additional features include a silence/test button that lets you quiet the alarm and verify its operation, end-of-life alerts to notify you when it’s time to replace the detector, and a low battery signal mute that can silence the warning for up to eight hours. The easy-access battery door makes battery installation or removal quick and hassle-free without needing to dismount the alarm. Model Number: 346504
View full details

Technical Specs Technical Specs

Overview
First Alert 3V Electrochemical Digital Carbon Monoxide Alarm is designed to provide reliable and consistent monitoring of carbon monoxide levels in your home. This battery-operated alarm features advanced electrochemical sensors that accurately detect dangerous carbon monoxide threats. The easy-to-read backlit digital display allows you to quickly see both current and peak CO levels, ensuring you stay informed at all times. Powered by two replaceable AA batteries, it continues to function even during power outages, giving you peace of mind. Additional features include a silence/test button that lets you quiet the alarm and verify its operation, end-of-life alerts to notify you when it’s time to replace the detector, and a low battery signal mute that can silence the warning for up to eight hours. The easy-access battery door makes battery installation or removal quick and hassle-free without needing to dismount the alarm. Model Number: 346504
Other Tech Specs
Carbon Monoxide Detector

Customers Also Viewed

Illustration of a hand truck tilted back with three stacked red cardboard boxes of varying sizes ready for transport.

Flexible Pickup & Delivery

Find a lower price on an exact item? We'll match it. Some exclusions apply.

Learn More
Shield outline in black containing a large red checkmark, representing safety and trust in home improvement and tools.

Authorized Dealer

We are an authorized dealer of several top brands, providing high-quality products with unmatched service.

Learn More
Two red brushstroke shapes forming a stylized heart outline against a transparent background, symbolizing care or love.

Family-Owned

We are a fourth-generation family-owned business built on community, trust, and family values.

Learn More
Illustration of a house outline with a red heart shape integrated above the Hartville Hardware Lumber name, symbolizing community commitment in home improvement.

Price Pledge

We will price-match items our customers find at local competitors for less money on in-store and online purchases.

Learn More