... /1800/850/1900>>SIM Card : Supporting 3V SIM Card>>Antenna : 50 Ω SMA Antenna interface>>Serial : RS-232C, Default communication parameter 9600 ... Overflow Level Sensor, Oil Overflow Level Sensor, Water Leak Sensor, Temperature Sensor, Door Sensor, PIR Motion Sensor, Smoke Sensor, Gas Leak Sensor, Glass Break Sensor, Shock Sensor, Power failure sensor, etc ...