... to read the values of analog input, TTL, digital input, pulse counter and so on.The GPRS wireless ... /IP protocol stack;Supports transparent and non-transparent data transfer;Supports point-to-point, Point–to–Multipoint, Multipoint- ... ItemSpecificationWorking Voltage12VDCPower ConsumptionStandby145~65Ma; Registering GPRS Netork:225~65Ma; Transfer data:265~285Ma;GPRS NetworkFrequency: 850 MHz, 900 MHz, ...