... and up to 8 NC/NO inputs and RS232 Serial Port. It allows you to monitor and control an alarm or remote ... 50mA>>Frequency : Quad-Band 900/1800/850/1900>>SIM Card : Supporting 3V SIM Card>>Antenna : 50 Ω SMA Antenna interface>>Serial : RS-232C ... Level Sensor, Water Leak Sensor, Temperature Sensor, Door Sensor, PIR Motion Sensor, Smoke Sensor, Gas Leak Sensor, Glass Break Sensor, Shock ...