Can authorize 999 users, based on GSM network, widely used, can operate anywhere, no distance limit Detect the state of the door at all times, alarm the illegal intrusion, and use the caller ID to automatically identify unknown callers For remote control equipment - doors, gateposts, guardrails, garage doors, shutters and home appliances APP control, providing remote control for users with different needs SMS smart alarm, built-in 2-way digital input, when any trigger, it will send a reminder message to the designated number, take care of the whole family, and immediately start the alarm to protect your assets through the GSM network. Two digital input door sensors, motion sensors or other sensors to protect your doors and windows, when any of them are triggered, will send SMS alert message and activate the siren immediately., Manufacturer: MNMIOIO