"Compatible with 1 phase 2 wires, 3 phase 3 wires, 3 phase 4 wires systems. -11 to 300V (L-N), 19 to 519V (L-L) measurement. -Accuracy of Class 1 for energy -LED Display with 1 row of 6 digits -Dual source input, RS485 and MODBUS RTU (EM306-C-D) -LED for Pulse Indication"