4PCS Upgraded Wedge Door Stop Alarm with 120 dB - Great Gift for Traveling Residential Home Apartment Door Stopper Security Tools

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Introduction: Extra loud alarm. Simply place the alarm behind any door. If an intruder attempts to open the door, the wedge -shaped design will prevent it from opening and activate a 120 dB alarm. The alarm will scare off the would-be intruder and alert you to the attempted entry. Door stop alarm & door stopper keep intruders out, also prevent the doorknob from hitting the wall. High- quality: Made of high damping rubber & abs plastic, very convenient to use. Loud alarm: 120dB loud alarm sound could scare intruder. Portable alert 3 sensitivity levels: Low - Medium - High, with an adjustable sensitivity switch on the side. Easy to Install: Portable and easy way to add piece of mind when traveling or working alone. Widely use: Can be used in home, dorm, office hotel, motel & more. Specification: Powered by:1* 9v battery (not included) Single size: 5.5 * 1.8 * 1.6 inch Single weight: 0.25 lb Package includes: 4 x Door stop alarms (9v battery is not included.)