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℉

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⚡ Never be left in the dark—power protection that speaks up!

PROTECT YOUR ESSENTIALS - Perfect for freezers, CPAP machines, aquariums, and more—avoid costly losses and keep your critical devices safe.
SMART VOLTAGE MONITORING - Real-time LED voltage status—green for normal, red for high, blue for low—so you’re always in control.
LONG LASTING BATTERY LIFE - Powered by 3 AAA batteries (not included) with up to 2 years standby and 72 hours continuous alarm—reliability you can count on.
INSTANT POWER OUTAGE ALERTS - Stay ahead with a piercing 108 dB alarm and tri-color flashing light that never lets you miss a power cut.
EFFORTLESS PLUG PLAY SETUP - Simply plug into any 100-240V socket—no complicated installation, just instant peace of mind.

The HENDUN Upgraded Power Failure Alarm is a compact, easy-to-use device that plugs into any 100-240V outlet to monitor power supply interruptions. Featuring a loud 108 dB alarm and tri-color LED indicators for voltage status, it ensures you’re instantly alerted to outages or abnormal voltage. Powered by 3 AAA batteries, it offers up to 2 years standby and 72 hours of continuous alarm, making it ideal for safeguarding freezers, CPAP machines, aquariums, and other essential equipment.

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Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

TT$603

Duties & taxes incl.

Trinidad and Tobagostore

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30 daysfor PRO membership users

15 dayswithout membership

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Battery description	Alkaline
Voltage	240 Volts
Control method	Touch
Noise level	108 dB
Mounting type	Tabletop Mount
Sensor technology	Voltage Sensor
Manufacturer	Changzhou Hengdun Electronic Technology Co Ltd
Item Weight	91 g
Product Dimensions	5.84 x 5.84 x 7.11 cm; 91 g
Item model number	hnfpa
Color	Blue,Green,Red
Installation Method	Dashboard Mount
Item Package Quantity	1
Included components	Detector
Batteries Included?	No
Batteries Required?	No
tech_spec_battery_description_toys	Alkaline

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

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