The new sensitive door window alarm will be a really good assistant for your smart house, no more worry about the invasion by external objects or strangers, protecting your home and valuables from unnecessary danger, greatly increasing home security. HIGH SENSITIVE SENSOR - The door alarm with built-in high sensitive sensor and it will make a 130dB loud sound when the distance of the alarm and magnetic strip is less then 15mm, which detects the opening or closing of doors and windows, and monitors your home door and windows status.LOUD DETACHED SIREN: Place the Siren anywhere in the house or office for your own convenience. WIDE APPLICATION - Apply this smart door window sensor to different scenes, your bedroom, garage, bathroom, garden and anywhere you like, keeping your whole house away from danger with a linkage of the smart door/window sensor, great and easy home security system.