Check the listing for details. Door Security Bar with Alarm. Color: See Description, Condition: New, Made in CN. Listed at 43.84 USD. Our double-duty Door Security Bar with Alarm not only blocks your inward-opening doors from being opened, its alarm also alerts you when someone tries to enter. This heavy-gauge steel bar extends from 29" high to 43" to brace any door from opening for added security and protection. As soon as the doorknob is touched, a loud and clear alarm sounds. Choose from a powerful warning siren sound or a barking dog sound, both are effective sounds to deter intruders. This indoor security bar features a nonslip bottom. There is no assembly necessary and it collapses easily for travel. This easy-to-use door bar lock installs in seconds and no tools are required to help secure your home, aparent, dorm rooms or offices from intruders. Great to bring on road trips for hotel rooms, too. This security b.