Amazon offers its Prime members the Doberman Security Ultra-Slim Window Alarm 4-pack for $19.91 shipped. Matched at Home Depot as well. Regularly going for $30, you’ll save $10 from the list price. Today’s deal also matches the lowest offer we’ve seen at Amazon. Rated 4.3/5 stars from over 800 customers, these are a great way to add extra protection to your home without shelling out the big-bucks for a full security system. 

Doberman Window Alarm Features:

  • Detects Window Vibration – Instantly alerts you of a potential break in with loud 100 dB alarm
  • Unique Ultra-Slim Design – Perfect for your home, office, garage, dorm room, or even RV
  • Vibration Trigger Technology – Built-in vibration sensor perfectly tuned – will not go off in rain, wind, etc.
  • Easy Installation– Simply peel and stick, no tools needed. Warning sticker on backside deters theft
  • Includes 3 Button Cell Batteries (LR44)

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Blair Altland's favorite gear