First off, let me say this thing is LOUD. Like, 'startle-your-neighbor's-dog' loud. I installed it on my e-bike after reading mixed reviews, and wow—110dB isn't just a number. It's legit concert-level noise that made me jump the first time I accidentally triggered it (more on that later).

The sensitivity adjustment is a game-changer. My bike sits outside a coffee shop often, and setting it to level 5 prevents false alarms from passing trucks while still catching any tampering. Pro tip: Skip the default max sensitivity unless you enjoy your bike screaming every time a leaf lands on it.

Installation was... an adventure. The battery compartment? A puzzle box designed by someone who hates thumbs. I used a butter knife (don't judge) to pry it open, and yes—the remote's battery did go flying across the room. But once set up? Seamless. The adhesive held through rain, and the remote works from my apartment window to the street.

Unexpected bonus: The doorbell mode. I stuck a spare unit on my shed door as a joke... now I grin every time delivery guys trigger a cheerful 'Ding Dong' instead of an air-raid siren.

Downsides? The manual reads like translated hieroglyphics, and no waterproofing means my unit lives under the bike seat now. But for $20? If this deters one sketchy person from touching my ride, it's paid for itself ten times over.