... overvoltage,undervoltage,overload,short-circuit,day/night .EtcStandard communication interfaceRS232( RS485,RJ45,GPRS optional)Cooling MethodNatural coolingTemperature compensation(optional)4mV/°C ... (12/24v)120/240 wOutput waylight sensitive switch, timing switch Controller software is optional, you can view system working status in ...