Temperature Data Loggers GSM/3G/4G LTE S266 , 1. Quad band 850/900/1800/1900Mhz GSM GPRS Module inside; 2. 3G UMTS/HSDPA/4G Modules are optional.; 3. 32 bit MCU, reliable performance with in-built watchdog; 4. Support temperature & humidity monitoring remotely in real-time; 5. Support 8 channel temperature input interface(DS18B20 Temperature sensors); 6. Support 2 relay outputs,7A@125VAC 5A@125VAC 20A@14VDC; 7. High/Low Alert via SMS/Call/GPRS; ,