wsdcam SF22R 113dB Bike Alarm Wireless Vibration Motion Sensor Waterproof Motorcycle Alarm with Remote,Black

This is definitely not a joke. It works EVERY time, and it's loud enough to hurt. You can set the sensitivity with the key fob. The instructions are fine, but if you need to see rather than read, there are YouTube videos. It's easy, I assure you. I'm not sure how this would fit on any standard bicycle if you want to conceal it, but it comes with two 3M adhesive pads and zip ties for easy install. Fits my needs perfectly though.

Puedo graduar el nivel de sensibilidad para que no salte con el ruido, me ha encantado!!!

Un antifurto elementare ma perfettamente efficace e semplice da utilizzare, ottimo per bici. Ampiamente consigliato

Ordered this for a European bike trip where I wanted something cheap and cheerful to just give me peace of mind when I park my motorcycle overnight, coffee stop etc. Ok so the English translation isn’t the best and wouldn’t get an A* in a GCSE but you get the idea easy enough and it works a treat. Click button to arm and click button to disarm. Stick it on with the supplied stick pads and cable ties and if the bike is jogged or moved the thing lets rip with a shrill ear piercing scream that will keep most thieves at bay. If they want to steal your bike they’ll get it anyway even with the best alarm kit. It was £17, it does the job and will do fine.

So far so good! Arrived very quickly as advertised and was fitted within minutes. Nice and sensitive (my friend went to sit on my R1 and it immediately 'warned him' with a loud beep. Gives a bit of a sense of safety when parked outside my house at night. Good purchase and excellent value for money.