🏘️【Quick Alarm】Once the alarm and the magnet are separated more than 0.78 inches (20mm), the door alarm will sound, and the 100 dB super strong window alarm sensors can detect any abnormality of your windows and doors immediately, if you need to be quiet, just switch to "off" mode. | 🏘️【Multifunctional】Door alarms for kids safety can also be used as a door alarm, pool door alarm, garage door alarm or sliding door alarm. TECKNET window alarm sensors are the perfect solution for apartments, mobile homes, offices, hotels, garages and more. | 🏘️【Easy to install】Just tear off the attached sticker, and 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.) | 🏘️【Mini & Portable】This door and window alarm is designed to be light and mini, and can be put into any backpack when you go out. When you live alone in a hotel, it will be your best security partner. (Note:If the alarm isn't working, check if it's in OFF mode or if the batteries need replacing.) | 🏘️【36-Month Warranty】If you encounter any problems in using the product, please feel free to contact our professional customer service team, enjoying TECKNET 36-Month Warranty (Registered Only)