2Pcs Door Stop Alarm Home Travel Wireless Security Alert Portable Hotel 120 dB

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. The on/off switch will prevent the unit from accidentally sounding. FEATURES 120 dB Alarm3 sensitivity modes: high, medium, lowON/OFF switchGreat for Home or TravelDimensions: 5 ½" x 2" x 1 ½"1-year Warranty REQUIRES One 9 volt battery