---
product_id: 713733663
title: "First Alert SCO501CN-3ST Wireless Interconnected Combination Smoke and Carbon Monoxide Alarm with Voice Location, Battery Operated"
brand: "first alert"
price: "$1147637"
currency: COP
in_stock: false
reviews_count: 5
category: "First Alert"
url: https://www.desertcart.co/products/713733663-first-alert-sco501cn-3st-wireless-interconnected-combination-smoke-and-carbon
store_origin: CO
region: Colombia
---

# Wireless interconnect up to 18 units 85dB loud alarm with voice location Battery-operated for easy installation First Alert SCO501CN-3ST Wireless Interconnected Combination Smoke and Carbon Monoxide Alarm with Voice Location, Battery Operated

**Brand:** first alert
**Price:** $1147637
**Availability:** ❌ Out of Stock

## Summary

> 🚨 Stay ahead of danger with smart, connected peace of mind!

## Quick Answers

- **What is this?** First Alert SCO501CN-3ST Wireless Interconnected Combination Smoke and Carbon Monoxide Alarm with Voice Location, Battery Operated by first alert
- **How much does it cost?** $1147637 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co](https://www.desertcart.co/products/713733663-first-alert-sco501cn-3st-wireless-interconnected-combination-smoke-and-carbon)

## Best For

- first alert enthusiasts

## Why This Product

- Trusted first alert brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dual Threat Detection:** Photoelectric smoke + electrochemical CO sensors minimize false alarms while maximizing safety.
- • **Trusted Legacy of Safety:** From the pioneers of home alarms since 1958, reliability you can count on.
- • **Clear Voice Location Alerts:** Know exactly where danger strikes with 11 programmable voice locations.
- • **User-Friendly Battery Access:** EZ access battery drawer means no ceiling removal for quick changes.
- • **Effortless Wireless Safety Network:** Connect up to 18 alarms seamlessly for whole-home protection.

## Overview

The First Alert SCO501CN-3ST is a battery-operated, wireless interconnected smoke and carbon monoxide alarm featuring advanced photoelectric and electrochemical sensors. It supports up to 18 linked units, delivering clear 85dB alarms with voice location alerts to pinpoint threats. Designed for easy installation and maintenance, it offers a trusted, comprehensive safety solution for modern homes.

## Description

The First Alert SCO501CN 3ST Combination Smoke and Carbon Monoxide Alarm with Voice Location detects both smoke and carbon monoxide in a single device. The alarm interconnects with up to 18 other First Alert enabled alarms in your home to create a wireless safety network. The photoelectric smoke sensor is designed to reduce false alarms from cooking smoke or shower steam while remaining sensitive to real danger. The advanced electrochemical CO sensor detects carbon monoxide leaks from multiple sources, including faulty fuel burning appliances. A loud 85 decibel siren and a voice alarm with 11 programmable locations indicate where and what the threat is. EZ access battery drawer, no need to remove alarm from ceiling to change battery.

Review: 2 years later, the alarm goes off for no reason. I changed the batteyr but still goes off.
Review: Update: A little cooking accident caused a lot of smoke (no fire). The nearest alarm went off properly, and all of the linked alarms went off as well. Silencing the alarm required holding down the silence button for five seconds or so, which silenced all of the linked alarms. This review is based ONLY on the installation and setup. I just installed 7 units. The installation is very easy...took me about 60 seconds per unit to install the mounting rings.. You'll need a Phillips head screwdriver and a drill with a 3/16 bit for the mounting holes. I'm pretty handy with tools, but there was nothing involved in this that a novice should have difficulty with. Follow the instructions for where they should be mounted. There is a "dead zone" where walls and ceilings meet. Smoke detectors are ineffective in that zone. The previous owner of my home mounted all of the old detectors right in the dead zone. Oops. The programming is easy IF you read the directions and follow them exactly. Women should do fine; men will probably have to try programming a couple times before they figure out which simple step they overlooked. (I got it on the second attempt.) If you are overdue for new bifocals like I am, you might need a magnifying glass. The programming took less than a minute per unit when I did it correctly. Use hearing protection while you are programming and and testing. Seriously. All of the units will be going off at the same time on the table in front of you. At 85 decibels each, it is extremely loud, My total project time for installing all 7 was about 45 minutes hour from opening the box to putting up my tools. My units are spread out over three levels of the house (one in the basement, two on the first floor, one in an upstairs hallway, and one in each of three bedrooms). No issues with them communicating with each other. I tested each one individually and made certain it was communicating with all the others just to be sure. Running up and down all the stairs 7 times was a good workout. Again, hearing protection is advised. I have no doubt we will all be awakened if we ever have a fire in middle of the night. I really like the voice feature. If I have an alarm I will not have to go running through the house to figure out where the problem is. It clearly enunciates which unit is going off. Hopefully I will never find out how they operate in an emergency. I will update if I have any operational issues.

## Features

- Battery operated smoke and carbon monoxide alarm can be installed easily
- Connects multiple alarms together for wireless safety network
- Voice alarm gives clear indication of where the problem is located
- Features photoelectric smoke sensor and electrochemical CO sensor
- One button silences a false alarm and tests the unit. Loud 85 decibel alarm.NOTE: Kindly refer to the user manual provided as a PDF manual in the product description section.First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000EVO7C2 |
| Best Sellers Rank | #244,662 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #675 in Safety Sensors & Detectors #1,053 in Fire Safety |
| Department | Electronics |
| Item model number | SCO500 |
| Manufacturer | First Alert |
| Product Dimensions | 12.7 x 12.7 x 5.08 cm; 90.72 g |

## Product Details

- **Brand:** First Alert
- **Colour:** White
- **Power source:** Battery Powered
- **Product dimensions:** 5.1D x 12.7W x 12.7H centimeters
- **Style:** SCO501CN-3ST

## Images

![First Alert SCO501CN-3ST Wireless Interconnected Combination Smoke and Carbon Monoxide Alarm with Voice Location, Battery Operated - Image 1](https://m.media-amazon.com/images/I/51s8KY2qHTL.jpg)
![First Alert SCO501CN-3ST Wireless Interconnected Combination Smoke and Carbon Monoxide Alarm with Voice Location, Battery Operated - Image 2](https://m.media-amazon.com/images/I/61e5TRDubdL.jpg)

## Available Options

This product comes in different **Pattern, Style** options.

## Customer Reviews

### ⭐⭐ Review
*by M***E on 11 May 2024*

2 years later, the alarm goes off for no reason. I changed the batteyr but still goes off.

### ⭐⭐⭐⭐⭐ Review
*by S***M on 13 January 2014*

Update: A little cooking accident caused a lot of smoke (no fire). The nearest alarm went off properly, and all of the linked alarms went off as well. Silencing the alarm required holding down the silence button for five seconds or so, which silenced all of the linked alarms. This review is based ONLY on the installation and setup. I just installed 7 units. The installation is very easy...took me about 60 seconds per unit to install the mounting rings.. You'll need a Phillips head screwdriver and a drill with a 3/16 bit for the mounting holes. I'm pretty handy with tools, but there was nothing involved in this that a novice should have difficulty with. Follow the instructions for where they should be mounted. There is a "dead zone" where walls and ceilings meet. Smoke detectors are ineffective in that zone. The previous owner of my home mounted all of the old detectors right in the dead zone. Oops. The programming is easy IF you read the directions and follow them exactly. Women should do fine; men will probably have to try programming a couple times before they figure out which simple step they overlooked. (I got it on the second attempt.) If you are overdue for new bifocals like I am, you might need a magnifying glass. The programming took less than a minute per unit when I did it correctly. Use hearing protection while you are programming and and testing. Seriously. All of the units will be going off at the same time on the table in front of you. At 85 decibels each, it is extremely loud, My total project time for installing all 7 was about 45 minutes hour from opening the box to putting up my tools. My units are spread out over three levels of the house (one in the basement, two on the first floor, one in an upstairs hallway, and one in each of three bedrooms). No issues with them communicating with each other. I tested each one individually and made certain it was communicating with all the others just to be sure. Running up and down all the stairs 7 times was a good workout. Again, hearing protection is advised. I have no doubt we will all be awakened if we ever have a fire in middle of the night. I really like the voice feature. If I have an alarm I will not have to go running through the house to figure out where the problem is. It clearly enunciates which unit is going off. Hopefully I will never find out how they operate in an emergency. I will update if I have any operational issues.

### ⭐⭐⭐⭐⭐ Review
*by F***A on 30 December 2025*

Bought as a replacement unit. The item was delivered promptly and was able to sync with my other detectors easily.

## Frequently Bought Together

- FIRST ALERT SCO501CN-3ST Smoke and Carbon Monoxide Alarm, 120 V, White, Pack of 1
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---

*Product available on Desertcart Colombia*
*Store origin: CO*
*Last updated: 2026-03-08*