Complete Protection: These door and window alarm sensors offer a complete protection plan for the security of your home, office, or any living space. With the option to use one for a door and one for a window, or both for windows, this cost-effective solution will keep you and your family safe. INSTANT ALERT - Help secure the doors and windows of your home, office, or apartment with the 110 dB door/window alarm or chime. Easy to use and deafening alarm that will alert you and your neighbors of an intruder, or deter the intruder. An attention-grabbing alarm is audible hundreds of feet away. The compact magnetically triggered alarm sounds when a window or door is opened. Don't worry about the alarm being deafening, quickly press the button to adjust the volume as needed from 120dB to 110dB. Easy Installation: The simple, wireless design of the alarms is perfect for home, apartment, dorm, and office security. Use the included double-sided mounting tape to attach them to your window or door of choice in minutes - Each alarm is powered by 3 included button batteries. What You Get: 2 x Door and Window Alarms (batteries included), 2 x Mounting Tapes.