NOVMAY Door Stopper Alarm with 120db for Traveling Big House Apartment Hotel Personal Security Safety Tools One

Upgraded:New design and material lead to better product quality SIZE: 5.5 x 1.8 x 1.5 inch WEIGHT:0.22lb( without battery) perfect for traveling or traveling in an uncertain environment. DUAL FUNCTION:When you switch it ON it is a door stopper alarm(When triggered, it makes a loud noise of 120 db scare the intruder away), when you turn it OFF it is an general door stopper(will keep the intruder outdoor). EASY INSTALL:NO installation required, just put 9v battery in and switch the button on the back to "ON", simply place the alarm behind any doors then it can works. The bottoms are made of synthetic rubber for keep the alarm from slipping. Note: the package does not include any batteries. SERVICE: If you have any problems, please contact us. We will try my best to help you solve it.