... Lightning protection, Electrostatic protection, Over current protection), 3-Phase AC Power Opto isolated inputs to detect the Electricity A, B, ... Manual X1Resistors X8USB Cable x1Specifications of the GSM GPRS Power Facility Alarm S250:Rated Voltage: 110 to 220VAC,2AStandby ... 50KgSkype: AsiaGSMalarm GPRS Outdoor Alarm Controller S250,Three-Phase Power Line Protection,NC/NO/EOL Dry Contact,Remote Relay ...