[Powerful Function]---- The power meter can measure and calculate the power consumption and cost of connected devices/help monitor time, voltage, active power, energy cost, etc., which can save you energy and money. [LCD Display]---- The power meter can display various data, power consumption (0.00-9999kWh), active power (0.1-3.680W), and supply voltage measurement and calculation (200-). 276 V) and (0.00-99.99?), easy to read and record data in the dark. [Built-in Rechargeable Battery]---- The built-in 3.6V (NI-MH) rechargeable battery can be used to store electricity. This way, the meter can be moved and displayed without losing readings, which is very convenient. [Versatile] ---- The electricity meter can measure the power consumption, voltage, current, and carbon dioxide amount of other appliances...