【 Monitor electricity usage and know the cost intuitively 】 The power consumption meter can measure power (W), volts, amps, frequency, power factor, maximum and minimum power (W), cumulative time and energy (kWh) and automatically calculate the cost after setting the price; monitor household electricity usage and help you save electricity costs 【 Large clear LCD display with backlight 】 The electricity meter has a wide viewing angle and clear digits; easy to read and use the electricity meter in dark areas with the backlit clear LCD display 【 Long-term data retention memory function 】 Comes with built-in rechargeable battery backup, the wattmeter can hold data for up to 90 days in case of power outage or when the meter is unplugged from the socket; all data including the cost setting will reset to zero when you press the reset button 【 Portable and only takes up one socket 】 Compact size; the power meter's socket plug leaves the lower wall socket available when plugged into the upper socket; made of high-quality fire-resistant material; friendly after-sales customer service and 1-year limited warranty; Note: compatible with inverters and solar inverters 【 3680W overload indication 】 This power meter can measure 110-130 Vac & 200-240 Vac voltage (Note: The label on the back of the wattmeter only shows 110-130 Vac low voltage range due to certification requirements); 0-16A AMP; 0-3680W power and indicates overload when the load is up to 3680W; Class 1.0 accuracy standard with 0.1W, 0.1V, 0.001A and 0.001kWh resolution