---
product_id: 4940544
title: "ACR 3971.3 Firefly PRO Solas Water Activated Rescue Strobe Light"
brand: "acr"
price: "€ 149.52"
currency: EUR
in_stock: true
reviews_count: 11
category: "Acr"
url: https://www.desertcart.gr/products/4940544-acr-3971-3-firefly-pro-solas-water-activated-rescue-strobe
store_origin: GR
region: Greece
---

# 360° water-activated beam, 3+ miles visibility 41 candelas ultra-bright output 56 hrs strobe on AA lithium batteries ACR 3971.3 Firefly PRO Solas Water Activated Rescue Strobe Light

**Brand:** acr
**Price:** € 149.52
**Availability:** ✅ In Stock

## Summary

> 🚨 Stay Seen, Stay Safe: The Ultimate Marine Signal Light You Can’t Afford to Miss!

## Quick Answers

- **What is this?** ACR 3971.3 Firefly PRO Solas Water Activated Rescue Strobe Light by acr
- **How much does it cost?** € 149.52 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/4940544-acr-3971-3-firefly-pro-solas-water-activated-rescue-strobe)

## Best For

- acr enthusiasts

## Why This Product

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

## Key Features

- • **Unmatched Visibility:** 360° beam visible over 3 miles, delivering superior brightness that meets SOLAS & USCG standards.
- • **Compact & Ready-to-Go:** Lightweight, pocket-sized design fits seamlessly in life jackets or survival kits for instant access.
- • **Extended Battery Life:** Powered by AA lithium batteries offering up to 56 hours of strobe time—double the competition.
- • **Triple Activation Modes:** SOS, Strobe, and Steady-On modes for versatile, reliable signaling in any emergency scenario.
- • **Military-Grade Durability:** Rugged casing built to withstand harsh marine environments, ensuring your safety gear never fails.

## Overview

The ACR Firefly Pro Waterbug is a SOLAS and USCG certified military-grade LED strobe light designed for marine safety. Featuring a powerful 41-candela output with 360° water-activated visibility over 3 miles, it offers SOS, strobe, and steady-on modes powered by long-lasting AA lithium batteries. Compact and rugged, it fits easily into life vests and survival kits, delivering reliable emergency signaling with up to 56 hours of strobe time—exceeding industry standards for durability and performance.

## Description

Product Description Great Product From the Manufacturer The Firefly PRO Waterbug LED Strobe Light is one of the brightest, most feature-packed emergency strobe lights available. With three activation modes—ultra-bright strobe, SOS strobe for Search and Rescue alerts, and Steady-On for close-up recovery—it’s designed to save lives in extreme conditions. Featuring an advanced light output management system, it produces over 41 candelas of light for up to 56 hours using AA lithium batteries. Its wide-light emission LEDs create a 360 beam visible over 3 miles, offering superior brightness with cool white light, free from yellow tinting. Built with a rugged military-grade casing, it withstands harsh environments. With a compact design, it fits easily inside life jackets or pockets for comfortable wearability. The Firefly PRO exceeds USCG and SOLAS requirements, offering twice the battery life of competitors. The included Velcro strap and lashing loops ensure quick and easy mounting to gear, keeping it within reach when you need it most.

Review: Works like they say it does - Looks good and works fine. The light output is good and bright but I don't see the cost in the construction. The plastic is thin and they don't even supply batteries with it.
Review: Important safety feature - Good product size and illumination

## Features

- Great Product

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00KC68SVA |
| Batteries are Included | No |
| Best Sellers Rank | #162,170 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #54 in Boat Strobe & Safety Lights |
| Brand Name | ACR |
| Color | Yellow |
| Customer Reviews | 4.6 4.6 out of 5 stars (54) |
| Finish Types | Natural |
| Global Trade Identification Number | 00791659003411 |
| Included Components | Great Product |
| Item Dimensions L x W x H | 10"L x 8"W x 2"H |
| Item Type Name | Great Product |
| Item Weight | 2.4 ounces |
| Light Source Special Features | Mode Switching (SOS, Steady-On, Strobe) |
| Light Source Type | Light Emitting Diode |
| Manufacturer | ACR Electronics |
| Manufacturer Part Number | 3971.3 |
| Manufacturer Warranty Description | Warranty. |
| Material Type | Plastic |
| Model Number | 3971.3 |
| Mounting Type | Table Mount |
| Number of Batteries | 1 Lithium Ion batteries required. |
| Number of Light Sources | 1 |
| Power Source | Battery Powered |
| Shape | Rectangular |
| Smart Home Compatibility | Not Smart Home Compatible |
| Specification Met | approved |
| Style Name | Lights |
| UPC | 791659003411 |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts |

## Product Details

- **Color:** Yellow
- **Finish Type:** Natural
- **Light Source Type:** Light Emitting Diode
- **Material:** Plastic
- **Shape:** Rectangular

## Images

![ACR 3971.3 Firefly PRO Solas Water Activated Rescue Strobe Light - Image 1](https://m.media-amazon.com/images/I/71lF2grKeYL.jpg)
![ACR 3971.3 Firefly PRO Solas Water Activated Rescue Strobe Light - Image 2](https://m.media-amazon.com/images/I/51N5RUpRGaL.jpg)
![ACR 3971.3 Firefly PRO Solas Water Activated Rescue Strobe Light - Image 3](https://m.media-amazon.com/images/I/811n2tDTgRL.jpg)
![ACR 3971.3 Firefly PRO Solas Water Activated Rescue Strobe Light - Image 4](https://m.media-amazon.com/images/I/71c7O90XQcL.jpg)
![ACR 3971.3 Firefly PRO Solas Water Activated Rescue Strobe Light - Image 5](https://m.media-amazon.com/images/I/71vu3xF8vFL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works like they say it does
*by J***. on July 13, 2024*

Looks good and works fine. The light output is good and bright but I don't see the cost in the construction. The plastic is thin and they don't even supply batteries with it.

### ⭐⭐⭐⭐⭐ Important safety feature
*by D***Y on August 19, 2025*

Good product size and illumination

### ⭐⭐⭐⭐ Review
*by O***N on January 10, 2026*

NO ERA LA MARCA ESPERADA PERO ANDA CORRECTAMENTE

## Frequently Bought Together

- ACR Firefly Pro Waterbug LED Strobe Light – Military-Grade, SOS & Steady-On Modes, SOLAS & USCG Certified, High-Intensity Marine Safety, Emergency Visibility & Durability (3971.3)
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- ACR HemiLight3 HL3 Automatic Survivor Locator Light, Med, Solas, and USCGC Approved, Ensures Reliable, Automatic Distress Signaling for Swift Rescue in Emergencies.

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-05-06*