Yohii Wedge Door Stop Alarm Portable Security System Device for Home Travel Apartment Dorm Intruder Alert with 120 dB Siren

Specifications:120 dB alarmA 9V Battery is required (not included) Size: 13.7 x 4.5 x 3.7cm/ 5.4" x 1.8" x 1.5" (L*W*H) Net Weight: 118gFeatures:Quick and affordable way to add piece of mind when traveling or working alone. Simply place the alarm behind any door. If an intruder attempts to open the door, thewedge-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. An adjustable sensitivity switch prevents tampering. When traveling, just toss this lightweight unit in your luggage. The on/off switch will prevent the unit from accidentally sounding. Requires one 9 volt battery - not included.