---
product_id: 300250058
title: "BRK RM4 Smart Relay for First Alert"
brand: "first alert"
price: "€ 72.87"
currency: EUR
in_stock: true
url: https://www.desertcart.ie/products/300250058-brk-rm4-smart-relay-for-first-alert
store_origin: IE
region: Ireland
---

# 120V AC powered for reliable activation Triggers auxiliary devices instantly on alarm Seamless integration with BRK & First Alert detectors BRK RM4 Smart Relay for First Alert

**Brand:** first alert
**Price:** € 72.87
**Availability:** ✅ In Stock

## Summary

> 🔔 Amplify your alarm game — because safety should never be silent.

## Quick Answers

- **What is this?** BRK RM4 Smart Relay for First Alert by first alert
- **How much does it cost?** € 72.87 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/300250058-brk-rm4-smart-relay-for-first-alert)

## 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

- • **Power-Packed Performance:** 120V AC power ensures consistent and reliable activation when it matters most.
- • **Versatile Alarm Enhancement:** Easily add strobes, sirens, bells, door closers, or exhaust fans to amplify your alert system.
- • **Effortless Smart Integration:** Automatically links your smoke, heat, or CO detectors to auxiliary devices for a smarter safety network.
- • **Quick & Trusted Installation:** Socket mount design and UL certification mean faster job site turnarounds with peace of mind.
- • **Made in the USA, Built to Last:** Crafted by First Alert/BRK Brands, a name synonymous with home safety and durability.

## Overview

The BRK RM4 Smart Relay for First Alert is a 120V AC powered relay that automatically activates auxiliary devices like strobes, sirens, or door closers when compatible BRK or First Alert smoke, heat, or carbon monoxide detectors sound an alarm. Designed for easy socket mounting and UL certified, it enhances your home or job site safety by creating a connected, responsive alarm system.

## Description

BRK RM4 Smart Relay for First Alert

## Features

- Activates auxiliary devices when alarm device sounds
- Works with compatible BRK and First Alert smoke, heat, and carbon monoxide detectors
- 120V AC powered
- Enhances the effectiveness of your detector alarm
- Great for adding a strobe light, siren, bell, door closer, or similar device

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Connector Type | [Proprietary] |
| Contact Material | Aluminum |
| Contact Type | Normally Open |
| Current Rating | 1 Amps |
| Mounting Type | Socket Mount |
| Brand | FIRST ALERT |
| Operation Mode | Automatically,Off |
| Coil Voltage | 120 Volts |
| Maximum Switching Voltage | 120 Volts |
| Minimum Switching Voltage | 120 Volts |
| Number of Terminals | 3 |
| Specification Met | UL |
| UPC | 029054175007 029054000576 |
| Manufacturer | First Alert / BRK Brands, Inc. |
| Country of Origin | USA |
| Item model number | RM4 |
| Product Dimensions | 8.89 x 0.25 x 3.81 cm; 63.5 g |
| ASIN | B0039PF21U |

## Product Details

- **Connector Type:** [Proprietary]
- **Contact Material:** Aluminum
- **Contact Type:** Normally Open
- **Current Rating:** 1 Amps
- **Mounting Type:** Socket Mount

## Images

![BRK RM4 Smart Relay for First Alert - Image 1](https://m.media-amazon.com/images/I/617CnTxx84L.jpg)

## Frequently Bought Together

- First Alert BRK RM4 Smart Relay for First Alert
- First Alert Hardwired Heat Alarm with Battery Backup, BRK Brands HD6135FB
- BRK First Alert 9120BFF/ SMI100-AC Smoke Detector, Hardwired Alarm with Battery Backup, White, 1-Pack

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---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-16*