Features 1、120 Decibels High Pitch Alarm: 120 decibels high pitch alarm, when someone opens the door to invade the room, a harsh alarm sound will ring out, scare off intruder and alert the owner of the room and relevant security personnel. 2、Adjustable Three Level Sensitivity: The three level sensitivity is adjustable, and the pressure sensitivity can be adjusted according to different situations. 3、Stainless Steel Pressure Plate: Durable stainless steel pressure plate, the bottom of the non slip design, will not easily be forced to push the door into the intruder, can be very good to resist the effect. 4、Small and Flexible: You only need to provide 1pcs 9V battery for power supply. The overall design is small and flexible, and convenient to carry. It is a necessary safety device for you to travel with, especially for female users. 5、Easy to Use: Easy to use and fine workmanship. Great for travel, home, bedrooms, hotels, apartments, dorm rooms, front doors, etc. Specifications Item Type: Wireless Door Stop Alarm Weight: Approx.106g / 3.7oz Product Size: Length: Approx.13.7cm / 5.4in Width: Approx.4.7cm / 1.9in Height: Approx.3.8cm / 1.5in Power Battery: 1pcs 9V Battery (Battery Not Included) Material: Stainless Steel + Plastic Alarm Sound Decibel: 120 Decibels Sensitivity Gear: 3 Level Package List 1 x Alerter (Battery Not Included)