Portable Wedge Door Stop Alarm Wireless Security System Travel Household Safety Alert Tool 1. Women living alone and traveling alone in hotels, especially need a door stop alarm. Once there are criminals trying to invade the room, they will send a high alarm sound of 120 decibels to scare off the criminals and remind you and neighbors. 2. Three-stage sensitivity adjustable. Adjust the pressure sensitivity according to different situations. 3. It is an ingenious and effective way to deter intruders, the alarm activated when the door is pushed open. It ensures your safety and peace of mind wherever you go. Package Included: 1x door stop alarm (Battery is Not Included) Note: 1.Duetodifferentpersonalmeasurementmethods,therewillbeanerrorof1-3cm,pleaseunderstand (1inch=2.54cm) 2.Besidesdifferentcomputersdisplaycoloursdifferently,thecolouroftheactualitemmayvaryslightlyfromthebelowimages,thanksforyourunderstanding. Thanksforyoursupport:)