Sistema de Alarma 4G 3G 2G GSM Seguridad para el Hogar 8 Canales Mensaje SMS Llamada APP 5-16V DC
You can choose the input port to be NC or NO to alarm. Built‑in 4G module, can work anywhere in the world through 4G, 3G and GSM Net. The input is a switch signal. Item Type: 4G/3G/GSM Alarm Module.