?Door/Window Alarm Kit?Features 2 window /door sensors, a loud 120dB alarm unit (siren) and remote control. The magnetic door sensor is triggered when the door/window opening, the siren unit will receive the signal and emit a high-pitched alarm. ?2 kind of alarm mode?Portable alarm unit has burglar alert mode and chime mode. Burglar alert will automatically stop after 60 seconds, another chime mode can last 30 seconds, it can also be stopped by using the remote control. Prevent your kids going out and protecting your home. ?360ft Remote Control Range?Arm/Disarm/SOS/Shift mode operation. The SOS function is suitable for patient, elderly, or who need calling for help at home. Not need to yell to get others Attention. ?Easy Installation?Simply peel and stick the door/window magnetic sensor, suitable for patio door, garden gate, home safety. The door alarm receiver and remote control are battery powered and portable. ?Expandable?You can expand your home security system with up to 30 accessories: door magnetic sensors, motion detectors, smoke detectors and so on.