Multifunctional Performance Monitor: Our power consumption monitor can monitor the power (W), current (kWh), voltage (V), frequency (Hz), current (A), power factor (PF) and unit price () /kWh), total cost () of your devices. By switching between 8 display modes, you can easily see the different parameters during operation of the device. In "Power" mode, you can calculate and display how much power your device consumes. And in "Total Cost" mode, it shows how much electricity bill has cost in time.