TECKNET Door Alarms for Kids Safety, Window Alarm Pool Alarms Door Alarm for Home Security, 2-in-1 Alarm & Chime, 3-Level Volume Control, Wireless Alarm for House Hotel Cars Sheds Caravans (3 Pack)

【Quick Alarm】When the distance between the alarm and the magnetic sensor exceeds 0.78 inches, the door alarm will sound an alarm and the LED light will come on, TECKNET alarm system for home security can quickly alert you to any abnormality of the door and window.
【3-Level Volume Control】Door alarms for kids safety can also be used as a pool door alarm, garage door alarm or sliding door alarm. The window alarm sensors with 3 levels of volume control are the perfect solution for apartments, mobile homes, offices, hotels, garages and more.
【Easy to Install】Just tear off the attached sticker, you can install the alarm sensor on various parts of the house, such as doors, windows, cabinets, drawers, gates and more! (Note: Keep the installation area clean and ensure that the sensor is installed within 0.5 inches from the arrow side of the alarm)