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HENDUN

Upgraded Bike Alarm Waterproof with Remote, Vibration Motorcycle Bicycle/Door Burglar Alarm,eBike Anti Theft 113dB Loud, Adjustable Sensitivity, Scooter Accessories Vibration Sensors

    • Based on 1,629 reviews
Condition: New
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$17.99 Why this price?
Holiday Deal · 33% off was $26.98

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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Dec 31
Order within 17 hours and 29 minutes
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Features

  • SUPER LOUD 113DB - Vibration triggering loud alarm to scare away thieves.Prevent Robbery and Door Prying.
  • ADJUSTABLE SENSITIVITY - High sensitive vibration sensor,7 level from gentle touch to push or beat.Adjustable volume.
  • EASY INSTALLATION FIRM AND WATERPROOF - No wiring, no screw,provide super strong adhesive tapes and cable tie for installation.IP55 waterproof design, can use for outdoor.
  • MINI SIZE - 3.7"*1.6"*0.8" exquisite and compact design, easy to hide and install, suitable for bike/car/motorcycle/door/moped anti-theft alarm.

Brand: HENDUN


Maximum Range: 20 Meters, 10 Meters


Noise Level: 113 dB


Remote Control Included?: Yes


Manufacturer: Changzhou Hengdun Electronic Technology Co Ltd


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 3.7 x 1.8 x 0.6 inches; 4.48 ounces


Item model number ‏ : ‎ SF03R


Batteries ‏ : ‎ 3 AAA batteries required.


Date First Available ‏ : ‎ November 19, 2018


Manufacturer ‏ : ‎ Changzhou Hengdun Electronic Technology Co Ltd


Country of Origin ‏ : ‎ China


Customer Reviews: 4.4 4.4 out of 5 stars 1,629 ratings


Item Weight: ‎4.5 ounces


Product Dimensions: ‎3.7 x 1.8 x 0.6 inches


Country of Origin: ‎China


Item model number: ‎SF03R


Batteries: ‎3 AAA batteries required.


Is Discontinued By Manufacturer: ‎No


Wireless Remote: ‎Yes


Date First Available: November 19, 2018


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Dec 31

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Loud Bike Alarm
Great price. Small compact, very loud. Works great. Easy to mount under bike seat.o Should definitely help keep thiefs away.
Reviewed in the United States on January 26, 2024 by Frank Perry
    • Surprisingly effective!
This little alarm is great. I purchased it for my golf cart. The sensitivity is perfect for our use. The first few days we had it I kept triggering the warning chirps because I was forgetting it was connected to the cart and not disarming it before getting onto the cart. Just enough sensitivity to go off without being over active. It has nice modern arm and disarm sounds and also has an option to change the sound that you use if you press one of the buttons on the fob as a "car finder" type sound. I like to trigger this sound when we drive or cart to a local store so people know it has an alarm system. The main alarm sound, after being set off by vibration, is the typical siren alarm sound you hear on most vehicle alarm systems. All of the sounds ate very loud. I Love that it's totally wireless and affordable, yet very effective. Its been about 1.5 week's since install (took 3 minutes) and I would definitely purchase it again. ... show more
Reviewed in the United States on May 15, 2020 by Justin Evans
    • Exactly as described and depicted. Decent alarm.
Review Image by Gnemik Gnemik
Review Image by Gnemik Gnemik
Review Image by Gnemik Gnemik
Review Image by Gnemik Gnemik
Seems many of the bike alarms look identical, so you need to pick seller carefully, hoping reviews and luck help. At least that's how I felt. Anyway, roll of the dice, and feel I got lucky. This alarm is apparently the latest updated version that's being sold. The 'fob' is bit gaudy, but I think the placement of buttons allows less button hitting errors. Size is fine, actually very acceptable. I used my own zip straps to affix the alarm unit on the seat post, in the vertical position. if you do the same, be sure you put the access screw on the bottom, so you can remove the casing to replace batteries. Otherwise you'll need to remove the zip strips, and then go through process of attaching it again. But, that might not be a bad idea, since you would be refreshing that aspect of attachment. Speaking of the locking screw and access to the batteries, I want to note that the initial attempt to open the case is not easy. Using the 'guitar pick' pretty much mangled the pick. Eventually, the case did disengage from the bottom, but it was a chore. Especially when you're being careful not to break or damage the product. Btw, the screw, one you get it a bit loosened, unscrews easily. Getting the case open, to remove the plastic tab (which obstructs the battery to keep them fresh until you set it up) was perhaps the most difficult part of installing the product. Which is a positive. You scan your bike to consider ideal location. I would not advise hiding it under the seat, because being in an enclosed area might limit the volume of the alarm. The brief instruction manual states that it should in an open area for optimum alarm protection. I tested the sensitivity of the unit in a vertical and horizontal position, and horizontal seemed slightly more sensitive. However, for safety and aesthetics, I affixed it in a vertical orientation. After zip locking it in place, I used the remote to activate the alarm. I jostled the bike a little..no alarm. Moved it with a bit more motion and it activated. I did not alter the sensitivity, using the default which is supposedly set to the most sensitive setting. I could not set the alarm to my choice of alarm type. Seems it rotates to the next alarm sound after activation. The included user guide/manual is sorely lacking in information/directions. I did notice that changing sensitivity is a series of button presses, which at the moment was too much hassle. Just hope it was in fact set to the default sensitivity mode (again, supposedly most sensitive). This was one of the lower priced of the identical models, with Prime shipping. I felt It was a good bargain, and the alarm met my expectations. Attached are photos to show real world images, with a ruler for size reference. Also, a picture of the alarm affixed to the bike seat post, in vertical position. Decent alarm, at good price. I view it as a moderately high level recommendation. ... show more
Reviewed in the United States on July 11, 2020 by Gnemik Gnemik
    • Works great
Put them on my RV. Looks good, doesn't interfere with the look of the RV and warns the thieves go to the other RV. Really is sensitive. Touch the door and the alarm goes off.
Reviewed in the United States on June 8, 2024 by P. VEASEY
    • Great for birds
Ever have birds eat your grass seed that you just planted? Put this thing outside and scare them away when they land. Great for scaring people too. LOL
Reviewed in the United States on October 24, 2024 by mender3
    • Super sensitive!
Great value for the money. I bought this for my SurRon and I put it at the bottom where the rear shock spring is. It’s actually wild how sensitive this thing is. I mean if I tap my bike’s seat the alarm will sound. If you want this for your bike it’s a great option. The installation was very easy however when your installing the zip ties please note that they are a one time use so only lock them in when your ready. The battery life has been going strong for over a month now . ... show more
Reviewed in the United States on July 25, 2024 by brandon
    • How to fix
It was very good at first now it won't stop beeping when Im riding and it's draining the battery all the time
Reviewed in the United States on October 22, 2023 by Amazing
    • VERY EFFECTIVE
I purchased this after another biker had his bike stolen in a secured cage area. It is very loud and the arming/disarming distance is better than expected.
Reviewed in the United States on May 24, 2024 by Gary J

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