Dual Function: Can be used as a door stop alarm and door stop. The high-density rubber construction helps prevent the door from sliding and provides added security. Ideal for use at home or while traveling. 3-Level Sensitivity: Adjustable sensitivity settings (high, medium, low) based on the distance between the door and the door stop. Loud Alarm: If the door is opened, the wedge design resists forced entry and triggers a 120dB alarm to alert you. 9V Battery Powered: Operates on a standard 9V battery. Under normal conditions, one battery can last up to one year. (Battery not included.) Easy to Use: No installation required. Simply place the device behind any inward-opening door, such as in homes, hotels, or dorms. Compact and portable, it is convenient for travel and personal safety. A practical choice for individuals, especially for solo travelers and women.