1DC5V16V power input, you can choose the input port to be NC or NO alarm mode, eightway alarm detection, each alarm SMS user can set different content by themselves. 2Up to 6 groups of called numbers can be set. When the alarm input triggers the signal, an alarm message will be sent to the alarm number, or call the alarm directly. 3Easy to use, we have customized APP, also support for iOS and for Android system APP, you can simply send text messages through APP to set up. 4The lowpower sleep mode design can detect the battery voltage in real time and make a low battery voltage alarm, which is suitable for batterypowered applications. 5The input of GL09B is a switch signal. When the input port is shortcircuited with the ground (GND), GL09 will send an alarm message to the preset alarm phone, or call the set alarm number. The content of the alarm message can be set by yourself. 6Wide application areas: mainly home security, warehouses, remote unattended stations, remote monitoring of equipment parameters (such as oil pressure, air pressure, water pressure, voltage, etc.), product upgrades (voltage monitoring, overload monitoring, etc.), safety protection (smoke , fire, water level monitoring, gas, etc.) Cpmdition: 100% } Item Type:8 Input GSM Alarm System Material: ABS Color: Black Input Voltage: DC5-16V Working Frequency: UMTS: 850/900/1900/2100MHz GSM/EDGE: 850/900/1800/1900MHz 1 x 8 Input GSM Alarm System 1 x Cable1 x Antenna1 x English Manual