Sounding a super-loud, 125 dB alarm at the slightest movement or sign of entry, this safety-minded door stop alarm protects your home and family—offering extra security you can take along for travel, too. Our security door stop features non-skid strips and movement sensor for added protection, with adjustable sensitivity that activates when tampered with. These door security devices use 2 AA batteries (not included). Safety door stop measures 5 3/4"L x 2"W x 5 5/8"H.