🚲 Fosmon Anti Theft Bike Alarm: Waterproof, Battery Operated, Loud 113dB Wireless Siren for Bicycle, E-Bike, Motorcycle, and More! Review

I'm disappointed that the alarm is triggered by wind and other invisible forces. I live in an apartment building and am concerned that it will be open 24/7 with no reason to disturb my neighbors.

Installation is easy, the device is securely fastened with cable ties. It is very loud. Motion detection is ok. I have to move my bike a bit to get it running, but it's a very heavy e-bike, so maybe that's why. All in all I would buy more if needed.

Excellent alarm, very sensitive, used in conjunction with an alarm disc lock and 2 combination locks, one cheap cable the other fabric covered chain. finally consider my bike safe from theft after my other bike was stolen with a cheap cable lock that was cut up.

I bought this device to keep track of my bag. I keep various items in a tote bag and when I put them down I want to make sure nobody touches them. This device works great. It's also handy as an alarm clock for my e-bike. I can buckle it up in seconds, which comes in handy when I have to leave my bike unattended within earshot for a minute or two.

I have an expensive Halloween decoration that I was a bit worried about so I tied it into the decoration. I sleep well at night knowing this thing is so loud it will wake everyone up and stop theft. It's impossible to take off my jewelry in less than a minute, and there's no way this alarm clock won't wake me up in less than a minute while I'm deep asleep.

For the first step, do this: Press and hold the unlock button for 6 seconds. During those 6 seconds, you'll see the blue light around the lock icon turn on, turn off, and then turn on again (you'll also hear a few sounds, but they're not important). If the blue light comes back on after 6 seconds, you're in business. Now you can follow instructions 2 to 4. That's it.

I would like to give higher stars, but the sensitivity function does not work and the SOS function is explained by complex steps. The printed manuals for Fosmon are poorly written. The "Activate SOS" function is poorly explained; Screaming for HELP would be easier. I think I've found better instructions, but there isn't a sensitivity feature from another company. UPDATE: The seller quickly contacted me (upgraded to 3 stars) asking me to contact the manufacturer with order details. I'm waiting…

The best thing about this alarm clock is that it's very loud. I can even hear it from my apartment when the bike is over 100 feet away. Installation was easy and the included tape and plastic zip ties helped me position the alarm in the correct spot on my seatpost. The only real issue I have with this alarm clock is that the sensitivity setting is difficult to adjust. With its default sensitivity, the slightest touch triggers the alarm. The cure for this is built into the alarm as it only…

The engineer who developed this device is not thoughtful. The instructions do not match what is actually happening. For example, press and hold a complex key sequence and wait for the blinking lights to go off and then come back on! Then you should hear 8 tones at the end. But do you only hear 3, or are they telling you to wait for 3 tones when it's actually 3 groups of 3 tones each? I couldn't figure it out and knowing this company must have come across this before and didn't give really clear