Message to Our Customers


Model # S184S

Internet # 204482840

Ultra Slim Door Guard Alarm

This item has been discontinued.
The Home Depot no longer carries this specific product.

$16.30 /each



Model # S184S

Internet # 204482840

This ultra slim door guard alarm is both simple and effective. No tools or mounting required. Just hang from your doorknob to detect vibration from attempted door entry.

  • High output 100-110 dB 6 tone alarm
  • Alarm/Off/Chime slide switch operation
  • Ultra slim design
  • Batteries included


Bore diameter (in.) 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Required door thickness (in.) 
1 3/4 
Alarm Sensor Type 
Alarm Sensor Type 
Audio Alert/Siren 
Backset size (in.) 
Battery Back-Up 
Color Family 
Commercial / Residential 
Commercial / Residential 
Finish Family 
Mounting Hardware Included 
Number of Sensors Included 
Product Weight (lb.) 
.12 lb 
Range (ft.) 
Safety & Security Product Type 
Lock & Door Reinforcer 
Surveillance Features 
No Additional Features 
Surveillance Included 
No additional components or accessories are included 
Visual Alert 
Wired or Wireless 
Warranty / Certifications
Manufacturer Warranty 
3 year limited 


Rated 4.0 out of 5 by 8 reviewers.
Rated 5.0 out of 5.0 by Backdoor alarm This is perfect if you want to protect your back door. The alarm is very loud and we are keeping the chimes on for now while we are in the house, but when we go out of the house, we set it to alarm. The alarm is extremely loud, but thankfully goes off after 20 seconds, so that's good, because it will chase the "would be" intruder away, and you won't be getting calls from your neighbors, telling you to come home to turn it off. When we are home, the chime alerts us if someone is at the door and it is not as frightening as the alarm. May 5, 2015
Rated 4.0 out of 5.0 by No problems purchase Product works well, purchase and pick up was easy. June 9, 2015
Rated 4.0 out of 5.0 by Super sensitive We live near a well traveled highway which is frequented by heavy trucks. The vibration from a truck set the alarm off. During a storm, a tree limb fell on our porch setting an alarm off. Other than that, if you have a steady hand and a steady door, they're a good value. We intend to take one with us on vacation. The alarm has 2 settings: a high shrill and a door bell type. September 2, 2014
Rated 5.0 out of 5.0 by Works great as advertised Ideal for temporary door alarm for when you stay in a Hotel or motel and for use around the house. It also works on camping trailer or motor home door. May 6, 2014
Rated 4.0 out of 5.0 by Simple to operate and fits well on our doors. Was not sure at first to the sensitivity of the alarm but has worked out well and definitely the alarm gets your attention. The rotating sounds are very effective to both alert you and I think in scaring someone. We liked it so well we bought 5 more for our family. April 8, 2014
Rated 5.0 out of 5.0 by does job I needed it for. have bought another one for travel. this works very well, have ordered a second one. have told all members in family and hope they also buy for security reasons. June 24, 2014
Rated 4.0 out of 5.0 by Good little door alarm This is a small door alarm that hangs on door knob. It goes off when moved. It is pretty loud and also has an option for chime instead of alarm. When turned on you get 10 seconds or so to hang it before it sensitizes. However, when you try to turn it off, it is impossible to do so without setting it off. The words along the setting button (chime/off/alarm) are very small and hard to read so you will have to memorize which way to push it to disarm it. The one thing that disappoints is the cover for the batteries has little plastic guide pieces that bend and break very easily and result in the cover not locking into place. Ours frequently falls off. We may have to tape it shut. For the money, I think it is a pretty good product. February 17, 2015
Rated 1.0 out of 5.0 by Not confident in this one.... Nice idea and good price however I could not get mine to work even after I changed to new batteries. I'm driving 200 miles round trip to return the two I purchase. August 19, 2014
  • 2015-07-01T13:40:02.071-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_8, tr_8
  • loc_en_US, sid_204482840, prod, sort_default
1-8 of 8


Standard Shipping includes delivery by small parcel service. Processing time varies by product.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.