... expansions, various accessories and software, specially designed for GSM/GPRS wireless systems being used for remote measurements, datalogging, control, diagnostics ... logging ( SD card socket built-in/optional accessory)specification Model: EXM-6DC-PT100-RIntegral GSM 850/900/1800/1900 ... , tolerance:+/-0.5oC, temp range: -50oC- 200oCAnalog Input signal:noOutputs:3 relay(10A)PWM:noHigh Speed Count(I7,I8 ...