Search  for anything...
HENDUN

Wireless Home Security burglar alarm, Magnetic Sensor Door Window Alarm, Super Loud 110dB, Pool Door Alarm for Kids Pack of 4

    • Based on 1,287 reviews
Condition: New
Checking for product changes
$20.99 Why this price?
Black Friday Deal · 63% off was $57.48

Buy Now, Pay Later

As low as $5 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Nov 30
Order within 12 hours and 19 minutes
Available payment plans shown during checkout

Features

  • Loud 110dB-enough to scare the intruder or notify neighbors.Prevent Robbery.
  • CHIME MODE - is ideal to prompt you when child, guests or dementia patients are opening the door.
  • ALARM ACTIVATED - when the parts are separated, recombined stops.
  • EASILY INSTALLATED - in pool doors/refrigerator/drawer/freezers/interior door for kids safety. battery can last longer.
  • RELIABLE AND GREAT VALUE - 3xLR44 batteries included, also Low battery indicator.Value for money home security products. If you have any questions, please feel free to contact us. We are always here.

Color: White


Brand: HENDUN


Power Source: Battery Powered


Compatible Devices: Home Security System


Product Dimensions: 1.97"L x 1.57"W x 0.59"H


Battery Description: ‎Alkaline


Number of Batteries: ‎3 LR44 batteries required. (included)


Control Method: ‎Touch


Noise Level: ‎110 dB


Mounting Type: ‎self-adhesive


Sensor Technology: ‎Contact Sensor


UPC: ‎664248632432


Manufacturer: ‎Changzhou Hengdun Electronic Technology Co Ltd


Part Number: ‎SF19


Item Weight: ‎1.25 ounces


Product Dimensions: ‎1.97 x 1.57 x 0.59 inches


Item model number: ‎SF19


Batteries: ‎3 LR44 batteries required. (included)


Is Discontinued By Manufacturer: ‎No


Size: ‎small


Shape: ‎Square


Installation Method: ‎Self-Adhesive


Item Package Quantity: ‎1


Switch Style: ‎Slide switch


Special Features: ‎Easy to Install


Batteries Included?: ‎Yes


Batteries Required?: ‎Yes


Battery Cell Type: ‎Alkaline


Description Pile: ‎Alkaline


Date First Available: November 29, 2017


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Nov 30

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • These alarm sensors work just fine.
we have a 4 year old grand daughter that we don't go out in the yard by herself, as we have a pool. Installing these alarms are very simple as they are wireless. They are very loud for their size, with a simple on-off switch that we turn on when we have our grand daughter over. This is an inexpensive gadget that does the trick, and enhances safety. ... show more
Reviewed in the United States on April 13, 2024 by Ralph P.
    • Extremely loud
These things are extremely loud, and they work great. Just need to remember to turn them off every morning
Reviewed in the United States on March 3, 2024 by Myranda Clack
    • Buy Extra Mounting Tape
These alarms are VERY loud which is great, and they're easy to install EXCEPT for one thing...... If the window/door is flush with the frame it's a snap to install. I did 12 windows in about 5 minutes. However, I had to put these on 6 different exterior doors. Since one piece goes on the frame, and the other piece goes on the door there is a problem. My door frames are not flush with the wall. I think very few doors are. So I had to use extra mounting tape to make them even with each other. I'm not talking about an extra layer, I'm talking about close to a full INCH. Luckily I had a large roll of permanent outdoor mounting tape already, which I ended up using for everything and not using their mounting pads at all. Another issue with their mounting pads is if you remove it from the frame of your door or window it takes paint with it. The outdoor mounting tape is more reliable PLUS you can remove it with no damage to the surface. I bought the Scotch brand. Other than that I'm pleased and feel much safer now. I put them on every door and window in the house. Just know that you're probably going to have to modify one of the pieces when you install them on regular doors. ... show more
Reviewed in the United States on August 12, 2019 by J. Wyatt
    • Easy and it works!
Was so easy to install and figure out. Took a minute from a to z.
Reviewed in the United States on July 8, 2024 by shavy
    • Great reasonable product
Bought these for my sliding doors near my pool they’re loud and let me know if the granddaughters are going out to the pool
Reviewed in the United States on February 8, 2024 by Debra Trotta
    • Good cheap burglar alarm. Useless door close warning
The door close warning mode has no delay at all. The alarm starts going off immediately when you open the door. This mode is supposed to help when you forget to close the door. Not go off immediately.
Reviewed in the United States on April 7, 2023 by Rob Bart
    • Loud
We were able to hear the alarm at the other end if the house. We use it to alert the caregivers , it doesn’t seem to bother our lady but atleast they know if she’s on the move. My friend used them for her autistic son and he would immediately shut the door worked to deter him from exiting the home
Reviewed in the United States on July 8, 2024 by Theresa N.
    • Easy to use but do not stay put
I bought two packs of these. The alarms keep falling of the windows and going off. The first time, I was not home and my neighbor had to listen to the alarm for hours. The second time I was luckily home. If you can, buy a different brand that offers reliability. Edit, a third one fell when I was not home. I do not recommend this product. ... show more
Reviewed in the United States on August 29, 2022 by Sonia A.

Can't find a product?

Find it on Amazon first, then paste the link below.