Let's talk about the ANKOSHUN Door Window Alarm Sensors. I installed these in my home, and honestly, they're a no-frills solution that just works. The 120dB siren is LOUD—like, 'make-you-jump-out-of-your-skin' loud. Perfect for deterring intruders or stopping curious kids from sneaking out.

The installation? A breeze. Peel-and-stick adhesive means no tools, no drilling, just slap 'em on your doors or windows. Pro tip: Keep the magnet and sensor within 0.5 inches, or they won't trigger properly (learned that the hard way with my sliding glass door).

The slim design is discreet—no ugly boxes ruining your decor. I love the two modes: full-on alarm for security, or a gentler chime for when you just want to know if someone's coming in (great for my home office).

Battery life seems solid so far, and the included extras are a nice touch. My only gripe? They're not smart devices—just basic alarms. But for under $20? These deliver serious value if you need simple, reliable entry alerts.