The DoorSTOP! Alarm is a simple and portable solution to prevent unauthorized entry through any doorway. Each DooorSTOP! Alarm has a 95 dB alarm that can be heard throughout a house. Wedge shaped with a rubber non-skid bottom, the DoorSTOP! isn't just an alarm - it helps to block unauthorized entry while sounding its ear-piercing alarm. Its small size makes it ideal for travel - simply put in front of a hotel or rental property doo