Can authorize 999 users, based on the 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 It is used for APP control of remote control equipment (doors, gateposts, guardrails, garage doors, shutters and household appliances), providing remote control for users with different needs SMS smart reminder, built-in 2-way digital input, when anything is triggered, 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