--- product_id: 495236423 title: "Hendun Power Failure Alarm ,Gfci Circuit Failed Dector Alerter" brand: "hendun" price: "1139217₫" currency: VND in_stock: true reviews_count: 13 category: "Hendun" url: https://www.desertcart.vn/products/495236423-hendun-power-failure-alarm-gfci-circuit-failed-dector-alerter store_origin: VN region: Vietnam --- # Tri-color LED voltage indicator 108 dB loud alarm 2 years standby battery life Hendun Power Failure Alarm ,Gfci Circuit Failed Dector Alerter **Brand:** hendun **Price:** 1139217₫ **Availability:** ✅ In Stock ## Summary > ⚡ Never be left in the dark—power protection that speaks volumes! ## Quick Answers - **What is this?** Hendun Power Failure Alarm ,Gfci Circuit Failed Dector Alerter by hendun - **How much does it cost?** 1139217₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/495236423-hendun-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 - • **Smart Voltage Monitoring:** Real-time LED voltage status keeps you informed of normal, high, or low voltage conditions at a glance. - • **Instant Power Outage Alerts:** Stay ahead with a piercing 108 dB alarm and vibrant tri-color flashing lights that never let you miss a beat. - • **Long-Lasting Battery Backup:** Powered by 3 AAA batteries, enjoy up to 2 years standby and 72 hours of continuous alarm during outages. - • **Effortless Plug & Play Setup:** No electrician needed—just plug into any 100-240V socket and protect your critical devices instantly. - • **Versatile Appliance Protection:** Safeguard everything from freezers and sump pumps to CPAP machines and aquariums—because every device matters. ## Overview The Hendun Power Failure Alarm is a compact, battery-powered device that plugs into any 100-240V outlet to monitor power supply with a loud 108 dB alarm and tri-color LED voltage indicators. Designed for easy installation, it provides up to 2 years of standby time and 72 hours of continuous alerting, protecting critical appliances like freezers, pumps, and medical devices from power outages and voltage irregularities. ## Description desertcart.com: Hendun Power Failure Alarm ,Gfci Circuit Failed Dector Alerter | Smart Power Outage Reminder for Freezer in Garage : Electronics Review: Nice & Loud - definitely would wake me up if power goes down! - 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: Exactly what you need if your appliance is plugged into a GFI outlet - Everything it promised, and louder! Very easy install, and now I won’t be the last one to know my freezer lost power. ## Features - Simple and Easy Installation: Just plug in the power outage alarm into any 100-240V socket or power cable and easily monitor the power supply to your basement freezer, fridge, pump, oxygen generator, CPAP, or aquarium - Multiple Alarm Methods: Accompanied by a 108 dB noise alert and a bright tri-color flashing light with various adjustable tones and volumes to ensure you are notified of power issues - Voltage Abnormality Monitoring: Features an LED strip to indicate the voltage status where green indicates normal voltage, red indicates high voltage, and blue indicates low voltage - Battery Powered Operation: Uses 3 AAA batteries (not included) with 2 years standby time and 72 hours continuous alarm capability, with items featuring built-in rechargeable batteries available under B0BFNSHH65 - Cost-Effective Protection: The 110v or 220v circuit tester reduces losses when you experience power outages, surges, or electrical accidents by providing immediate alerts - Versatile Monitoring Applications: Monitor power supply to critical appliances including sump pumps, refrigerators, freezers, CPAP machines, oxygen concentrators, dehumidifiers, and automatic feeders to prevent property damage and equipment failure ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BFPJKZXG | | Audible Noise | 108 db | | Battery Description | Alkaline | | Best Sellers Rank | #31,116 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Industrial Warning Alarms | | Brand | HENDUN | | Built-In Media | Detector | | Color | Blue,Green,Red | | Compatible Devices | [Inferred] Devices mentioned in product description | | Control Method | Touch | | Customer Reviews | 4.4 out of 5 stars 372 Reviews | | Item Dimensions L x W x H | 2.3"L x 2.3"W x 2.8"H | | Item Highlight | Smart Power Outage Reminder for Freezer in Garage | | Manufacturer | Changzhou Hengdun Electronic Technology Co Ltd | | Mfr Part Number | hnfpa | | Model Name | pfa | | Model Number | hnfpa | | Mounting Type | Tabletop Mount | | Number of Batteries | 3 AA batteries required. | | Number of Items | 1 | | Power Source | Battery Powered | | Product Dimensions | 2.3"L x 2.3"W x 2.8"H | | Sensor Technology | Voltage Sensor | | Size | 2.3 inches x 2.3 inches x 2.8 inches | | Unit Count | 1 Count | | Voltage | 240 volts | ## Product Details - **Brand:** HENDUN - **Color:** Blue,Green,Red - **Compatible Devices:** [Inferred] Devices mentioned in product description - **Power Source:** Battery Powered - **Product Dimensions:** 2.3"L x 2.3"W x 2.8"H ## Images ![Hendun Power Failure Alarm ,Gfci Circuit Failed Dector Alerter - Image 1](https://m.media-amazon.com/images/I/51DhlCQPtUL.jpg) ## Available Options This product comes in different **Set** 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 ### ⭐⭐⭐⭐⭐ Nice & Loud - definitely would wake me up if power goes down! *by A***W on September 23, 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!! ### ⭐⭐⭐⭐⭐ Exactly what you need if your appliance is plugged into a GFI outlet *by C***N on September 3, 2026* Everything it promised, and louder! Very easy install, and now I won’t be the last one to know my freezer lost power. ### ⭐⭐⭐⭐⭐ Very nice alarm for the price *by M***E on March 12, 2026* This alarm appears to be well made. I bought 3 and each one worked as designed once I installed batteries. The alarm is pretty loud. About as loud as you could expect from a 1-inch diameter speaker. I like that there are 6 different tones to choose from although I prefer the default sound. There's 3 volume levels plus mute. As soon as you plug it in it makes a sound and a greed light comes on to show you there's power in the circuit. When the power goes out it really lets you know. You can mute it manually or when the power is restored it resets itself. Very nice. I also like that it can take rechargeable AAA batteries and it has a built in charger. I'm using standard alkaline AAA's now. I recommend this alarm for anyone looking to monitor power to anything plugged into a GFI outlet. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vn/products/495236423-hendun-power-failure-alarm-gfci-circuit-failed-dector-alerter](https://www.desertcart.vn/products/495236423-hendun-power-failure-alarm-gfci-circuit-failed-dector-alerter) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-10-28*