Does this device have an alert when the batteries need to be replaced?

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.

How does this plug into "any 240v outlet" when 240v has a different prong configuration. Is an adapter included?

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.

Will this alert your phone, if outlet trips?

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.

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?

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℉

Hendun Power Failure Alarm Gfci Circuit Failed Dector Alerter

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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4979 kr

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Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Never miss a beat—power protection that’s loud, smart, and always on point!

PLUG PLAY SIMPLICITY - Just plug into any 100-240V socket—no complicated setup, perfect for monitoring freezers, CPAP machines, aquariums, and more.
ULTRA LONG BATTERY LIFE - Powered by 3 AAA batteries (not included) offering up to 2 years standby and 72 hours continuous alarm—no frequent recharging hassles.
SMART VOLTAGE MONITORING - LED strip instantly signals voltage status—green for normal, red for high, and blue for low—keeping your devices safe from surges.
ECO FRIENDLY ECONOMICAL - Avoid costly food spoilage and equipment damage with a reliable, energy-efficient circuit failure detector trusted by thousands.
INSTANT POWER OUTAGE ALERT - Stay ahead of spoilage with a piercing 108 dB alarm and tri-color flashing light that wakes you up even during deep sleep.

The Hendun Upgraded Power Failure Alarm is a compact, easy-to-use device that plugs into any standard outlet to monitor power supply interruptions. Featuring a loud 108 dB alarm and tri-color LED voltage indicators, it alerts users instantly to power outages or voltage abnormalities. Powered by 3 AAA batteries, it offers up to 2 years of standby time and 72 hours of continuous alarm, making it ideal for safeguarding freezers, CPAP machines, and other critical appliances. Its simple plug-and-play design and adjustable alert tones ensure reliable, eco-friendly protection against costly power failures.

Specifications

ASIN	B0BFPJKZXG
Audible Noise	108 db
Battery Description	Alkaline
Best Sellers Rank	#59,571 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #95 in Circuit Testers
Brand	HENDUN
Built-In Media	Detector
Color	Blue,Green,Red
Compatible Devices	[Inferred] Devices mentioned in product description
Control Method	Touch
Customer Reviews	4.5 4.5 out of 5 stars (365)
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 Number	hnfpa
Mounting Type	Tabletop Mount
Number of Batteries	3 AA batteries required.
Number of Items	1
Power Source	Battery Powered
Sensor Technology	Voltage Sensor
Size	2.3 inches x 2.3 inches x 2.8 inches
Unit Count	1 Count
Voltage	240 volts

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4979 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Iceland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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Hendun Power Failure Alarm ,Gfci Circuit Failed Dector Alerter

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