<b>They might pick your lock but they cannot get inside your hotel room, apartment, or home when secured by the Super Stop Alarm.</b><br> With box package which protect the product well<br> Battery Installation:<br> 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.<br> The on/off switch will prevent the unit from accidentally sounding. Requires one 9 volt battery - not included<br> Note:<br> The gap between door bottom and floor should be 1 - 3.5cm