---
product_id: 649336512
title: "First Alert Battery Combination Smoke & Carbon Monoxide Alarm with Voice | SMCO500V - Interconnected Alarm works with compatiable alarms, when one sounds, they all sound"
brand: "first alert"
price: "$118.02"
currency: USD
in_stock: true
reviews_count: 8
category: "First Alert"
url: https://www.desertcart.us/products/649336512-first-alert-battery-combination-smoke-and-carbon-monoxide-alarm-voice
store_origin: US
region: United States of America
---

# Voice & location alerts Battery-powered ease Precision Detection tech First Alert Battery Combination Smoke & Carbon Monoxide Alarm with Voice | SMCO500V - Interconnected Alarm works with compatiable alarms, when one sounds, they all sound

**Brand:** first alert
**Price:** $118.02
**Availability:** ✅ In Stock

## Summary

> 🚨 Stay ahead of danger with smart, clear, and connected protection!

## Quick Answers

- **What is this?** First Alert Battery Combination Smoke & Carbon Monoxide Alarm with Voice | SMCO500V - Interconnected Alarm works with compatiable alarms, when one sounds, they all sound by first alert
- **How much does it cost?** $118.02 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/649336512-first-alert-battery-combination-smoke-and-carbon-monoxide-alarm-voice)

## 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

- • **Voice & Location Alerts:** Clear spoken warnings tell you what and where the danger is—no guessing needed.
- • **Dual Smoke & CO Protection:** Two critical hazards covered in one sleek, reliable device for total peace of mind.
- • **Battery-Powered Convenience:** Easy installation and maintenance without wiring hassles—ready out of the box.
- • **Interconnected Alarm System:** When one sounds, all compatible alarms alert your entire home instantly.
- • **Precision Detection Technology:** Reduces false alarms with advanced sensing for smarter safety.

## Overview

The First Alert SMCO500V is a battery-operated combination smoke and carbon monoxide alarm featuring advanced Precision Detection technology to minimize false alarms. It provides clear voice and location alerts to guide safe evacuation and interconnects with compatible alarms for whole-home safety. Easy to install and maintain, this dual-threat device ensures reliable protection against fire and CO hazards.

## Description

The First Alert SMCO500V Interconnect Battery-Operated Combination Smoke & Carbon Monoxide with Voice & Location Alerts helps provide an early warning and guide your escape to safety. Also equipped with First Alert's Precision Detection advanced sensing technology that meets new industry standards.

Review: Clear, reliable, and essential for home safety - This unit combines smoke and carbon monoxide detection in one device, which simplifies both the install and the long-term maintenance. It came with batteries, screws, and anchors — everything needed to mount it to the ceiling. Installation was straightforward and took just a few minutes. The voice alerts are clear and the test button is easy to use. It integrates with other First Alert units, so if one is triggered, the others will sound as well. That kind of system-level awareness makes a real difference. I bought this as part of a broader approach to home safety and preparedness. It’s not something I interact with often, but knowing it’s there and functioning properly adds peace of mind. This is a quiet, essential device that supports a safer, more intentional home.
Review: works well - installationwas easy, great battery life, great valueforthemoney, good size, very reliable

## Features

- First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
- Through early warning interconnect, when one alarm sounds, all compatible* alarms will sound
- Voice & location alerts tell you what the danger is and its location to help you escape safely
- Battery-operated alarm is easy to install and maintain
- Provides reliable 2-in-1 protection against both smoke and carbon monoxide

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CV54Z1Q7 |
| Alarm | Smoke and CO Alarm |
| Best Sellers Rank | #8,198 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #25 in Smoke & Carbon Monoxide Alarms |
| Brand | First Alert |
| Built-In Media | AA Batteries |
| Color | White |
| Customer Reviews | 4.2 out of 5 stars 317 Reviews |
| Global Trade Identification Number | 00194160011843 |
| Item Dimensions D x W x H | 5"D x 5"W x 2"H |
| Item Type Name | Smoke and CO Alarm |
| Item Weight | 10.9 ounces |
| Manufacturer | Resideo |
| Mfr Part Number | 1048446 |
| Model Number | SMCO500V |
| Number of Items | 1 |
| Power Source | Battery Powered |
| Product Dimensions | 5"D x 5"W x 2"H |
| Product Style | Precision Detection |
| Sensor Type | Photoelectric |
| Style | Precision Detection |
| UPC | 194160011843 |
| Unit Count | 1 Count |

## Product Details

- **Alarm:** Smoke and CO Alarm
- **Brand:** First Alert
- **Color:** White
- **Global Trade Identification Number:** 00194160011843
- **Item Weight:** 10.9 Ounces
- **Material:** Plastic
- **Power Source:** Battery Powered
- **Product Dimensions:** 5"D x 5"W x 2"H
- **Sensor Type:** Photoelectric
- **Style:** Precision Detection

## Images

![First Alert Battery Combination Smoke & Carbon Monoxide Alarm with Voice | SMCO500V - Interconnected Alarm works with compatiable alarms, when one sounds, they all sound - Image 1](https://m.media-amazon.com/images/I/61CT1CiIWIL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Clear, reliable, and essential for home safety
*by E***F on June 26, 2025*

This unit combines smoke and carbon monoxide detection in one device, which simplifies both the install and the long-term maintenance. It came with batteries, screws, and anchors — everything needed to mount it to the ceiling. Installation was straightforward and took just a few minutes. The voice alerts are clear and the test button is easy to use. It integrates with other First Alert units, so if one is triggered, the others will sound as well. That kind of system-level awareness makes a real difference. I bought this as part of a broader approach to home safety and preparedness. It’s not something I interact with often, but knowing it’s there and functioning properly adds peace of mind. This is a quiet, essential device that supports a safer, more intentional home.

### ⭐⭐⭐⭐⭐ works well
*by K***A on July 5, 2026*

installationwas easy, great battery life, great valueforthemoney, good size, very reliable

### ⭐⭐⭐⭐⭐ Awesome Interconnected Smoke & Carbon monoxide detector (battery unit) with voice
*by J***W on August 15, 2025*

I've used previous iterations of this Battery operated (Wirelessly Interconnected) Smoke & Carbon Monoxide Detector (w/voice) in the past and this unit (SMCO500V) lives up to its predecessor. It's simple to use and setup (provided instructions are read - to pair the units wirelessly to work together). - They're Loud...but Not too loud - thankfully. - The mounts are a standard design to other smoke detectors (that can screw into the ceiling apparatus) and thus no new mounts were needed to attach these units in my home. - Battery-wise: If these units function like their predecessors - I'm sure it will last for several months on the eneloop AAs which I have been using for smoke detectors over the years. - Battery drawers are easy to pull open and get the batteries out. Simply push upwards from the bottom (of the battery drawer) to release and swap your batteries. - Haven't experienced any false Alarms with these particular units yet...but will update this review if I do. - All in all, a good device that lives up to its predecessor 👍

## Frequently Bought Together

- First Alert SMCO500V, Interconnect Battery-Operated Combination Smoke & Carbon Monoxide Alarm with Voice Alerts, 1-Pack
- First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack
- BRK-First Alert SA520B OneLink Smoke Alarm, 120V AC, Hardwired, White

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-07*