Unboxing and Teardown of Window and Door alert ... things... aka. 8 good AAA batteries ;) VIDEO
I bought this box for 5RON, which is about 1.3USD. It contains four alarm-doorbell-chime thingies, which make a loud sound when you take away the small magnetic brick.
Kinda' OK products, they probably work as advertised ... totally worth even the original price of ~4USD.
Basically i got 8 free batteries and will use these alarms in some DIY project.
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Tags: DIY
window
door
chime
alarm
alert
aaa batteries
teardown
unboxing
magnet
security