Mengshen Bicycle Alarm, Wireless Anti-Theft Burglar Security Alarm for Bike Motorcycle Car Mobility Scooter Vehicles Door Window, 113db Super Loud and Waterproof (Remote Control Included)

Very good loud alarm. Seems OK so far.

Fitted this alarm to my MT-125 motorbike. Didn't want one that would drain the battery on my bike so I opted for a self contained unit. It's simple and easy to use. There's YouTube tutorials on how to set the sensitivity and ringer (just search the model number ->KS-SF22R<-). You can also test the alarm to hear which ringtone you picked and to see how flat the battery is (is quieter the lower the batteries). Only con is the batteries that come with the alarm aren't fantastic and I will be changing them for Duracell at a later date. No biggy though, you pay for the device and it's well worth it. TIP: I've got 2 locked slots on my bike, one requires the driver's key and the one is a ratchet screw. I would suggest to hide the alarm in an area that doesn't require the driver's key because the locks are easily picked and not everyone carries round a torque wrench around. Will update review if there's any issues...

I bought this wireless bike security alarm for my new bike as my old bike got stolen. I had a different but more expensive alarm on the other bike, but it did not seem to work well at all, and the battery was very limited lasting and so it didn’t last long enough. It had a lifespan of around 1 to 2 weeks before needing to charge. THIS However, was much more simpler to use and the seller claims it has a long battery span and so this is what had attracted me as there are limited alarm devices available on the internet to purchase. The price I paid for this alarm was moderately cheap and worth the bargain for me. If I was to choose to buy another bike alarm it’d be this one itself. You can also be flexible when using this gadget, you can change the bell sound when using it to warn or get people to come out of your way. Sound. The sound was exceptionally high in my view that if I was to use in a busy place like a supermarket it would attract so much attention from the public which is a good thing in my view. The only main dislike was the power technique, it uses simple non rechargeable batteries to charge and removing the gadget from the bike means you have to buy new cable ties and sticky pads so it could be time-consuming and a waste of resources. If it had those holding mechanism it would be more useful. I hope my review was helpful.

Having already had one electric bike stolen I was worried that the same thing would happen to my new one. It's frightening that thieves carry cutters that can break through the strongest of locks in a matter of seconds. This little device is impressive, just attach it to your bike in an unobtrusive place and it will sound a very loud alarm if your bike is so much as nudged. The remote control works over extreme distances, I was surprised that I was upstairs in my flat while the bike was downstairs and I pressed the remote accidently and it activated the alarm. At best this will work as a deterrent and could possibly frighten a potential thief, but it's not foolproof. If someone was determined enough it could easily be silenced with a hammer and there have been times when I've nudged my bike accidentally in a busy shopping area, the alarm has sounded and no one has taken any notice. There is no guarantees that it will stop your bike being stolen, but it does add a little more peace of mind knowing it could possibly save your bike if it did scare a potential thief away who was taken by surprise and thought twice before taking it with a loud alarm sounding.

Does exactly what it says. Not visible under our bike cover and I think just removing the cover would set it off. The alarm is very loud! I have set it off twice accidentally, once with the garden broom when I gently knocked the bikes and once when I caught it with water from the garden hose. It stopoed quite quickly, but from testing it we know if disturbed again it goes off for longer and is so loud we have to keep the control out where we can see it, definitely wouldn't want to be rummaging in a drawer while it is going off! The bikes are chained together, but from past experience that is no deterrent. So glad we didn't pay out for an expensive padlock and chain. No chance of anyone taking our bikes now, not without us hearing. Great to have the bikes out of the house again.

because my friends were so impressed i bought a 3rd one of these, now all 3 of us use them for security, as well as a good quality motorcycle lock. they are easy to install under the saddle where they cant be tampered with. no wires to join up and they let you know when the batteries have come near the end of their lives with little beeps. always keep spare batteries for both unit and remote handy and you'll be able to sleep at night knowing if anyone attempts to steal or tamper with your bike the noise is loud enough to wake the deepest sleeper. i wouldnt be without mine, which ive been using for the best part of 4 yrs. as stated use a good quality lock also, maybe alarmed like mine and you cant go far wrong. be aware though, the most ardent bike thief wont be put off by locks and sirens so take care and happy and safe riding.

Worth the price for a deterrent needs to be louder if your thinking of hiding it somewhere

I bought this for my powerchair. It is easy to use but not as loud as I had expected. I've only used it once when I left my chair fastened to a fence. I was only about 200m away but doubt if I would have heard the alarm at that distance. However it is still loud and persistent enough to deter a thief.