125 DB Window Door Alarm 4 Pack Door Magnetic Alarm Sensor Door Alarm Door Sensor Wireless Security Alarm Door Chime for Kids' Safety Home Garage Apartment Easy to Install(included 12 batteries)

Simple to Assemble: first you need to peel off the double sided tape on the back of the window alarms then you can assemble through the tape and stick the alarm on the door or window providing you with a convenient using experience. Done!, Loud sound: The door alarm can emit more than 125 decibels of sound, you can apply it to doors, apartments, etc. It can make you feel at ease when you are inside or outside the house, and can also prevent children from walking out of the room, How to Use: careful that the distance between the main unit and the magnetic strip cannot exceed 1 cm/0.39 inches then you need to turn on the toggle switch on the left side on the unit you will hear the window security alarm make sound above 125 DB, Low Voltage Display: the window alarm is practical when the red light on the front flashes showing that the battery needs to be replaced and it is easy to replace the battery first you need to push the battery compartment down, Package Includes: the package will provide you with 4 pieces of home security gadgets they are rich in quantity and composed of quality material can well meet your daily use and replacement needs