Toky DW9L series 3 phase multi-function power meter:1) To measure: Voltage, Current, Active Power, Reactive Power, Power Factor, Frequency (Hz), Kwh, 4 Quadrant Energy, etc. Total 28 electrical parameters;2) 240*160 dot big LCD for display.3) Two On-Off Input / Output, with remote control RS485 Modbus communicatoin and measurement function;4)..