Description: MultiFunctional: The bottom with mesh rubber can prevent the door sliding. With alarm switch, it can be used as a door stop alarm or door stopper when power switch is turned off. Compact Size: The door stop alarm is lightweight and compact. You can easy to carry around to go anywhere. Loud Alarm: Alarm volume up to 125 dB. The loud alarm can scare off intruders and alert the homeowner. It can better protect you and your family. Wedge door stopper measures Bottom length 11.2cm, Height 3.3cm, door stoppers special dedign for use at home, office, hotel rooms. Strong and Durable: Made of ABS plastic and PC, strong and flexible, not easy to deform. Powered by 3 LR44 batteries. (Not Included) Specification: Color: Black/ White(Optional) Material: ABS and PC Working modes: Vibration sensor Volumn of the alarm: 125 dB Battery: 3*LR44 battery(Not include) Size: 112x53x33mm Size Chart: 112x53x33mm/4.41x2.09x1.30inch Package Includes: 1*Door Stopper Alarm Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!