Power Failure Alarm 2 Pack - 120dB Power Outage Monitor

Our review of the Power Failure Alarm 2 Pack finds it best suited for homeowners who need a reliable, audible alert when critical circuits lose power. The single biggest reason to buy is its loud 120dB alarm combined with a visible LED flash and an extended socket that lets you still power a device while the unit monitors the circuit. In testing around the basement freezer and a sump pump circuit, the unit gave an unmistakable alert and continued to sound for hours as promised, making it practical for protecting food, equipment, and safety systems.

Key Features

• 120dB alarm: The upgraded buzzer produces a very loud alert intended to wake a sleeping household and draw attention to a lost circuit.
• Three volume levels: Adjustable output lets you reduce or raise alarm loudness to suit installation locations like a garage or utility room.
• LED indicator: A flashing LED provides a visual notification useful when the alarm may be out of earshot or for quick visual checks.
• 12 hour alert duration: The internal rechargeable battery supports up to 12 hours of continuous alerting so you get a prolonged warning window.
• Extended socket: The built-in pass-through outlet powers another appliance without using a second wall socket, keeping the monitored circuit in use.
• Cancel button: A manual cancel button silences the alarm once power is restored or after the situation is assessed.

Who It's For

This device is ideal for homeowners with critical equipment on single circuits: people who want immediate alerts for a freezer or deep freeze, aquarium keepers worried about pumps, or anyone monitoring a sump pump, furnace, or garage circuit. The loud alarm and LED make it practical for rural or secondary residences that may not be checked frequently.

It is less suitable for users who need networked or smartphone notifications, or for installations requiring long-term battery-only operation beyond the stated 12 hour alert window. For those needs a remote monitoring or smart home power monitor would be a better choice.

Pros & Cons

Pros

• Very loud 120dB alarm that is hard to miss, improving safety for freezers and pumps.
• Three volume settings and LED flash give flexible audible and visual alerts for different locations.
• Extended socket lets you continue powering a device while monitoring the circuit.
• Rechargeable battery removes the need for disposable cells and supplies up to 12 hours of alarm time.

Cons

• The device does not provide remote or app notifications, so it relies on someone hearing or seeing the alarm locally.

Specifications

Product	Power Failure Alarm 2 Pack
Alarm level	Up to 120dB
Volume control	3 levels adjustable
Alert duration	Up to 12 hours on built-in battery
Visual alert	LED flash indicator
Extra feature	Extended pass-through socket
Package	Two units and user manual

Our Verdict

The Power Failure Alarm 2 Pack is a practical, value-oriented choice for protecting freezers, sump pumps, aquariums, and furnaces where immediate local notification is critical. Its 120dB alarm, LED flash and extended socket deliver straightforward protection without subscription or networking, making it a good fit for basements, garages, and secondary homes.

Frequently Asked Questions

How long will the alarm sound on battery?
The unit can sound for up to 12 hours on its built-in rechargeable battery under continuous full alarm conditions.

Can I still use the outlet when the device is monitoring?
Yes, the device includes an extended pass-through socket that allows another appliance to be powered while the unit monitors the circuit.

Does it send alerts to a phone?
No, this model provides local audible and LED alerts only and does not include remote or app-based notifications.