JusimiBicycle Alarm, Wireless Waterproof Anti-Theft Bike Alarm with Remote Control, 7 Level Sensitivity, 113dB Super Loud Sound, for Bicycle/Motorcycle/Window/Electric Tricycle/Door

I bought this on a whim to try deter a disgustingly jealous person intentionally banging into our fence. Unsure if it would be sensitive enough and/or loud enough, let alone fit for purpose.Was I shocked! Amazing sensitivity, great build quality, discreet and small, excellent remote range and LOUD!! Boy oh boy is it LOUD! Perfect, just perfect.

Not specifically meant for rucksack but worked well anyway! Left it inside rucksack when padlocked and set it with the remote. If you touched the rucksack even slightly, the alarm would activate, which was quite loud and very off putting to would be thieves

Very loud, small. easy to install, easy to hide.... good valueI tried to open it and could not.... hoping that won't be a problem when it's time to switch the batteries...Would have been much happier if they installed a rechargable battery and charged a little more!

Great item for protecting outside items

My last alarm died after several years so bought this oneWorks perfectly, very loud, very sensitiveGreat!

Absolutely brilliant item 👏 👌 👍 😀 well worth the money 💰 🤑 💸

Item was not exposed to rain or anything and stopped working in 2 weeks, couldn't switch it off with remote and hat to take battery off with alarm going crazy. Terrible and waste of time and plastic.

VERY GOOD THANKS