2 Pack Power Failure Alarm and Power Back Alarm with Function Switchable, 0~120dB Adjustable Audible/Visual Monitor, Power Monitoring System Perfect for GFI/GFCI Trips, Freezer, Pump, Aquarium

TWO-IN-ONE FUNCTION: Through the rocker, the unit can be freely switched between two different functions (power failure alarm or power back alarm), making it convenient for use in different environments. Compared with the need to purchase two separate products for each function, this offers a more cost-effective advantage.
ADJUSTABLE AUDIBLE/VISUAL ALARM: It features a built-in replaceable 9V battery, an oversized speaker, and a flash light. The alarm volume can be adjusted via a knob. The flash light is brighter and the alarm volume is louder compared with traditional power failure alarms or power back alarms.
(MAX volume: 120dB) You can easily receive the alarm both indoors and outdoors, helping to protect your home security.
MORE PRACTICAL DESIGN: Compared with other alarms that can only be placed on low sockets, this product comes with a 2-meter extension cable, allowing you to mount the alarm as high as possible. With both audible and visual alarms, the alarm message can be spread over a wider range. The accessory includes a plug adapter, which is more friendly to users with limited plug holes and won't affect the surrounding plug-in space, providing an intimate use experience.
WIDE APPLICATION: As a power failure alarm, it will easily monitor the power supply to your basement freezer, oxygen generator, refrigerator, aquarium air pump, oven, oxygen machine, dehumidifier, etc. Meanwhile, as a power back alarm, it will help you know exactly when the utility power is restored and turn off the generator in time to minimize unnecessary power waste