Upgraded Door Stop Alarm 3 Pack Great for Traveling Home Security Door Stopper Doorstop Safety Alarm Tools for Home

They might pick your lock but they cannot get inside your hotel room, apartment, or home when secured by the Super Stop Alarm. With box package which protect the product well Battery-Installation: Make sure the on/off switch is in the "off" position. Turn the unit upside down and open the-battery compartment Install one 9-volt-battery (not included) and close the compartment. The on/off switch will prevent the unit from accidentally sounding. Requires one 9-volt-battery - not included Note: The gap between door bottom and floor should be 1-3.5cm