【STANDALONE ALARM ALARM】: On-site alarm with a loud siren up to 110dB, coupled with door/window sensors and PIR motion detectors to form an effective standalone apartment security system 【DURABLE DESIGN】: Flame retardant ABS housing, widely used in alarm hosts, air leak alarms and infrared peripheral alarm devices. This product is designed with fire protection technology and its housing is fire resistant. 【SECURITY HORN】: The 12V home tweeter can be connected to various alarm systems. When someone illegally enters, the horn will sound three times to let you know the location of the accident. 【EASY INSTALLATION】: The installation ways are flexible and convenient. The installation is generally on the wall, in the doorway, on the balcony and other places, the installation height is 2.5 meters or more. 【ALL SMALL & 【PORTABLE】: The product is small, flexible and easy to carry, so you can easily take it to where you need it, fix it and it will work for you.