Security Door Alarm, Wireless, Junk Item, Free Shipping, Anonymous Shipping

This item is listed as junk because it is unopened and its operation cannot be confirmed.
This is a Key Switch Set Door Alarm Wireless Magnetic Switch HSA-MK from Revex (REVEX) that was found while cleaning out my parents' house.
Although it is unopened...
The package is quite dirty as it was left in a cluttered drawer, and since it has not been tested for operation due to being unopened, it is being listed as junk.
We appreciate your understanding.

⚠️ Several screenshots of the product description are included for reference.
⚠️ The following is from the product description.
Function: Sounds an alarm to prevent theft and intrusion when doors or windows are left open or illegally opened.
Loud Volume: When opened, it emits an alarm sound of approximately 105dB.
Features: It is a key switch type, and the alarm can be set/released using the included key, which also helps prevent children's mischief.
Installation: It is a wireless type using a magnetic switch, making it easy to install without wiring.
Key Switch Set Door Alarm Wireless Magnetic Switch REVEX HSA-MK

Product Description
Easy to install, no wiring required, a reliable intrusion warning device that anyone can use. For apartment entrance doors. For single-family home entrance doors, back doors, windows, etc. For stockroom or warehouse doors. Uses one 9V 006-P alkaline battery (sold separately). [Package Contents] Main unit, magnetic switch, 2 keys, double-sided tape (1 large, 1 small), wood screws (5).
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#securitybuzzer
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#intrusionwarningdevice