---
product_id: 565063128
title: "Hendun Upgraded Power Failure Alarm, Gfci Circuit Failed Dector Alerter, Smart Outage Reminder For Freezer In Garage, Monitor Cut Of Cpap, Breaker And Gfi/Gfci Trip Alarm"
brand: "hendun"
price: "HK$375"
currency: HKD
in_stock: true
reviews_count: 5
category: "Hendun"
url: https://www.desertcart.hk/products/565063128-hendun-upgraded-power-failure-alarm-gfci-circuit-failed-dector-alerter
store_origin: HK
region: Hong Kong
---

# 100-240V universal plug-in Tri-color LED voltage indicator 108 dB loud alarm Hendun Upgraded Power Failure Alarm, Gfci Circuit Failed Dector Alerter, Smart Outage Reminder For Freezer In Garage, Monitor Cut Of Cpap, Breaker And Gfi/Gfci Trip Alarm

**Brand:** hendun
**Price:** HK$375
**Availability:** ✅ In Stock

## Summary

> ⚡ Stay powered, stay protected — never miss a beat with Hendun’s smart outage alert!

## Quick Answers

- **What is this?** Hendun Upgraded Power Failure Alarm, Gfci Circuit Failed Dector Alerter, Smart Outage Reminder For Freezer In Garage, Monitor Cut Of Cpap, Breaker And Gfi/Gfci Trip Alarm by hendun
- **How much does it cost?** HK$375 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/565063128-hendun-upgraded-power-failure-alarm-gfci-circuit-failed-dector-alerter)

## Best For

- hendun enthusiasts

## Why This Product

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

## Key Features

- • **Multi-Device Protection:** Safeguards freezers, sump pumps, CPAP machines, and GFCI outlets from power failures.
- • **Energy-Saving Investment:** Prevents costly food spoilage and equipment damage during outages and surges.
- • **Smart Voltage Monitoring:** Tri-color LED clearly signals normal, high, or low voltage status at a glance.
- • **Instant High-Decibel Alert:** 108 dB alarm wakes you from deep sleep or alerts neighbors instantly.
- • **Universal Voltage Compatibility:** Works seamlessly with any 100-240V outlet for versatile home use.

## Overview

The Hendun Upgraded Power Failure Alarm is a compact, plug-in device that monitors power supply across 100-240V outlets. Featuring a piercing 108 dB alarm and tri-color LED voltage indicators, it instantly notifies you of outages, voltage irregularities, or GFCI trips. Ideal for safeguarding freezers, CPAP machines, sump pumps, and more, it’s a smart, economical solution to prevent costly losses from unexpected power failures.

## Description

This is an upgraded version of the powerout alarm device. Immediately after a power lost, it emits a high-decibel alarm sound of 108 decibels, enough to wake you or your neighbors. You can monitor the power outage of your deep fridge the garage or basement, Sump Pumps, saving your property such as food. Avoid power outage losses during storms. Can monitor sump pumps, ovens, refrigerators, automatic feeders, oxygen machines, dehumidifiers, GFI GFCI outlet Trip alarm，short circuits Unstable voltage Low voltage or overload, CPAP,receptacle Circuit Testers

Review: These work great. We bought a second one after trying out the first, and they've already saved a fridge and freezer full of food. The alarm is nice and loud (you can choose among several and adjust the volume), and has always worked as expected, both in testing and in an actual power failure. The icing on the cake: if you use rechargeable AAA batteries, the unit charges them itself. Any modern device like this should do this, using consumer-replaceable rechargeable batteries, but before purchasing this one we were using an older unit that didn't. We're using these alarms on two GFCI outlets, one with a fridge/freezer combo and one with a chest freezer. GFCI outlets are notoriously troublesome, and before we put alarms on ours, we lost a chest freezer full of food without being able to repeat the issue or find the cause of the tripping. These alarms are the answer.
Review: I find AC power is going down more often than it used to, partly because it is California and they have some protection built in such that if a power line gets hit by a branch or even animal it could cause it to shut down power to prevent triggering a wildfire. It usually stays down for at least 2 + hour, sometimes more. Several times I've been on the very of having a whole refrigerator and freezer's worth of food spoiling so I ended up getting a 2 Kwh power station solely for my frig/freezer. Already had to use it twice in the last few months. During the day it is easy to know obviously when power goes down and I just go down and plug my frig into the power station. This little gem provides the protection if power ever goes down in the middle of the night while I am sleeping. It is nice & loud and would easily wake me up from even the deepest slumber. Well worth the investment and I highly recommend it. Only one con I would note. I'm not sure this would be loud enough if for example you are monitoring an outlet or device on the other side of the house or something. For me I just plug it into an outlet right in my bedroom because when I have a power issue the entire home is always affected. Suggest an enhancement where the main device can communicate with a wireless receiver and sound the alarm in the bedroom even if the monitoring device itself is on the other side of the house. Nevertheless this product is easily worth 5 stars. Update: on 6/8 AC power went down about 10:30pm when I was sleeping. This product indeed did its job well and woke me up from a deep sleep. Power was down until almost 4:30am and then was barely up for like an hour and went down again for another hour and a half. There is 100% chance my entire freezer and frig would have been full of spoiled food had it not been for this great product. Wish I could give this 10 stars!!

## Features

- ✅ SIMPLY AND EASILY - Just plug the powerout alarm into any 100-240V socket or power cable and easily monitor the power supply to your basement freezer / fridge, pump, oxygenerator,CPAP, aquarium
- ✅ VARIOUS ALARM METHODS - Accompanied by a 108 dB noise alert and a bright tri-colour flashing light with various adjustable tones and volumes
- ✅ VOLTAGE ABNORMALITY MONITORING- There is an LED strip to indicate the voltage status. Green indicates normal, red indicates high voltage and blue indicates low voltage
- ✅ ECONOMICAL INVESTMENT- the circuit testers reduces losses when you experience power outages / surge or accidents.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BFPJKZXG |
| ASIN  | B0BFPJKZXG |
| Batteries Included? | No |
| Batteries Required? | No |
| Battery description | Alkaline |
| Best Sellers Rank | #100,919 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #127 in Circuit Testers |
| Color | Blue,Green,Red |
| Control method | Touch |
| Customer Reviews | 4.6 4.6 out of 5 stars (294) |
| Customer reviews | 4.6 4.6 out of 5 stars (294) |
| Date First Available | 24 July 2023 |
| Date First Available  | 24 July 2023 |
| Included components | Detector |
| Installation Method | Dashboard Mount |
| Item Package Quantity | 1 |
| Item Weight | 91 g |
| Item model number | hnfpa |
| Item model number  | hnfpa |
| Manufacturer | Changzhou Hengdun Electronic Technology Co Ltd |
| Manufacturer  | Changzhou Hengdun Electronic Technology Co Ltd |
| Mounting type | Tabletop Mount |
| Noise level | 108 Decibels |
| Product Dimensions | 5.84 x 5.84 x 7.11 cm; 91 g |
| Product Dimensions  | 5.84 x 5.84 x 7.11 cm; 91 g |
| Sensor technology | Voltage Sensor |
| Voltage | 240 Volts |
| tech_spec_battery_description_toys | Alkaline |

## Product Details

- **Brand:** HENDUN
- **Colour:** Blue,Green,Red
- **Compatible devices:** [Inferred] Devices mentioned in product description
- **Power source:** Battery Powered
- **Product dimensions:** 5.8L x 5.8W x 7.1H centimeters

## Images

![Hendun Upgraded Power Failure Alarm, Gfci Circuit Failed Dector Alerter, Smart Outage Reminder For Freezer In Garage, Monitor Cut Of Cpap, Breaker And Gfi/Gfci Trip Alarm - Image 1](https://m.media-amazon.com/images/I/51DhlCQPtUL.jpg)
![Hendun Upgraded Power Failure Alarm, Gfci Circuit Failed Dector Alerter, Smart Outage Reminder For Freezer In Garage, Monitor Cut Of Cpap, Breaker And Gfi/Gfci Trip Alarm - Image 2](https://m.media-amazon.com/images/I/61QwB7dmAEL.jpg)
![Hendun Upgraded Power Failure Alarm, Gfci Circuit Failed Dector Alerter, Smart Outage Reminder For Freezer In Garage, Monitor Cut Of Cpap, Breaker And Gfi/Gfci Trip Alarm - Image 3](https://m.media-amazon.com/images/I/61eq04xhcHL.jpg)
![Hendun Upgraded Power Failure Alarm, Gfci Circuit Failed Dector Alerter, Smart Outage Reminder For Freezer In Garage, Monitor Cut Of Cpap, Breaker And Gfi/Gfci Trip Alarm - Image 4](https://m.media-amazon.com/images/I/510j7kMyasL.jpg)
![Hendun Upgraded Power Failure Alarm, Gfci Circuit Failed Dector Alerter, Smart Outage Reminder For Freezer In Garage, Monitor Cut Of Cpap, Breaker And Gfi/Gfci Trip Alarm - Image 5](https://m.media-amazon.com/images/I/61sOjetLgcL.jpg)

## Available Options

This product comes in different **Model** options.

## Questions & Answers

**Q: Does this device have an alert when the batteries need to be replaced?**
A: Thank you very much for your interest in our HENDUN power failure alarms.
It has a low voltage alert function.
Beeps “Du-Du” sound every 30 minutes when battery-voltage is lower than 3.6V.  Please change the batteries in time or use rechargeable batteries.

**Q: How does this plug into "any 240v outlet" when 240v has a different prong configuration.  Is an adapter included?**
A: Thank you very much for your interest in HENDUN power failure alarm.
The plug of the alarm is shown in the video. If it can't plug into 240V outlet directly, please use it after plugging in the converter on 240V outlet first.
The adapter is not included.
Thanks again.

**Q: Will this alert your phone, if outlet trips?**
A: Thank you very much for your interest in HENDUN power failure alarm.

When the outlet trips, only the local alert will be sent, and the mobile phone cannot receive the alert.

**Q: It states the working temperature is from -23f - about 15f.  texas garages can be over 100f in the summer time. what is the real working temperature?**
A: Thank you very much for your interest in our blackout alarms.
Because of our mistake, the working temperature was described wrongly, it should be: 14 ~ 140℉

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by C***U on 31 July 2023*

These work great. We bought a second one after trying out the first, and they've already saved a fridge and freezer full of food. The alarm is nice and loud (you can choose among several and adjust the volume), and has always worked as expected, both in testing and in an actual power failure. The icing on the cake: if you use rechargeable AAA batteries, the unit charges them itself. Any modern device like this should do this, using consumer-replaceable rechargeable batteries, but before purchasing this one we were using an older unit that didn't. We're using these alarms on two GFCI outlets, one with a fridge/freezer combo and one with a chest freezer. GFCI outlets are notoriously troublesome, and before we put alarms on ours, we lost a chest freezer full of food without being able to repeat the issue or find the cause of the tripping. These alarms are the answer.

### ⭐⭐⭐⭐⭐ Review
*by A***W on 23 September 2023*

I find AC power is going down more often than it used to, partly because it is California and they have some protection built in such that if a power line gets hit by a branch or even animal it could cause it to shut down power to prevent triggering a wildfire. It usually stays down for at least 2 + hour, sometimes more. Several times I've been on the very of having a whole refrigerator and freezer's worth of food spoiling so I ended up getting a 2 Kwh power station solely for my frig/freezer. Already had to use it twice in the last few months. During the day it is easy to know obviously when power goes down and I just go down and plug my frig into the power station. This little gem provides the protection if power ever goes down in the middle of the night while I am sleeping. It is nice & loud and would easily wake me up from even the deepest slumber. Well worth the investment and I highly recommend it. Only one con I would note. I'm not sure this would be loud enough if for example you are monitoring an outlet or device on the other side of the house or something. For me I just plug it into an outlet right in my bedroom because when I have a power issue the entire home is always affected. Suggest an enhancement where the main device can communicate with a wireless receiver and sound the alarm in the bedroom even if the monitoring device itself is on the other side of the house. Nevertheless this product is easily worth 5 stars. Update: on 6/8 AC power went down about 10:30pm when I was sleeping. This product indeed did its job well and woke me up from a deep sleep. Power was down until almost 4:30am and then was barely up for like an hour and went down again for another hour and a half. There is 100% chance my entire freezer and frig would have been full of spoiled food had it not been for this great product. Wish I could give this 10 stars!!

### ⭐⭐⭐⭐⭐ Review
*by K***N on 18 November 2024*

Fácil de instalar y usar bien volumen y varias opciones de alarma.

## Frequently Bought Together

- Hendun Upgraded Power Failure Alarm, GFCI Circuit Failed Dector Alerter, Smart Power Outage Reminder for Freezer in Garage, Monitor Power Cut of CPAP, Breaker and GFI/GFCI Trip Alarm
- Power Failure Alarm for Freezer, Briidea Power Outage Alarm with LED Indicator Lights and 80-120dB Adjustable Alarm, Perfect for Monitoring Refrigerators, Freezers, and Sewage, MK-077
- Briidea Power Failure Alarm with LED Indicator & 80dB Siren, Powered by Rechargeable Battery (included), Perfect for Monitoring Refrigerators, Freezers, Sump Pumps, Aquariums

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-18*