Sistema di allarme 4G 3G 2G GSM sicurezza domestica SMS messaggio chiamata APP 5-16V DC 8 canali
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.