... color liquid crystal display, simple operation, convenient; the large capacity memory, it can store 5000 sets of data; 12, With RS232 ... will be turning to the computer analyzed with; 13, With wireless PDA, convenient operation and data management. Technical Data GF3121Measurement rangeEffective ... Hz Dimensions 300mm×300mm×300mmHost quality 3.5Kg GF3121 wireless three-phase kWh meter site verification