Sabre Adjustable Door Security Bar w/ Attachable Alarm Mounting Type Under Door Mount Material Iron, Plastic, Rubber Color White Style Security Bar with Alarm LxWxH 20.5 x 0.88 x 1 inches EXTREMELY LOUD SIREN: Due to the sensitive vibration sensor and 120db alarm attachment, you and your loved ones will be kept safe and alerted (up to 1000ft away) if any intruders attempt to tamper with a door or window etc. 2-IN-1 DOOR SECURITY STOPPER & SLIDING DOOR JAMMER: Use this device for two different purposes with easy interchangeable caps for hinged doors and sliding door/window DOOR STOP SECURITY BAR: Angled rubber bottom that assures full contact and strong grip on all types of floors without scratching them EASY TO USE: The door stopper alarm easily props under door knob and easy to remove. Security bar can also be easily adjusted