I've been using these Xuhal alarms for a few weeks now, and they're surprisingly effective for the price. At less than $1 per unit, they're perfect for securing multiple entry points without breaking the bank.

The installation was a breeze - just peel and stick! I've placed them on windows, my garage door, and even some cabinets where I store valuables. The adhesive holds strong, though I did reinforce a couple with extra tape in high-traffic areas.

When triggered, that 90dB alarm is NO JOKE. It startled me the first time I accidentally set it off (oops!). But that's exactly what you want - enough to scare off intruders and alert you immediately.

Pro tip: Pay close attention to the alignment arrows during installation. When properly spaced (about 10mm apart), they work flawlessly. I did have one unit that needed battery replacement sooner than others, but at this price point, that's expected.

These aren't fancy smart home devices - just simple, reliable protection. For basic security needs from windows to storage cabinets, they deliver exactly what's promised. Just remember to buy AAA batteries separately!