Power Meter Function: Monitor your electrical usage and costs intuitively. This power consumption meter measures power (W), voltage, amperage, frequency, power factor, maximum and minimum power (W), cumulative time and energy (kWh), and automatically calculates costs based on your pricing. Keep track of your home's energy consumption and save on electricity bills. Large Clear LCD Display with Backlight: The kilowatt meter features a wide viewing angle and a crystal-clear display, making it easy to read and operate even in dark areas thanks to the backlit LCD screen. Long Time Data Hold Memory Function: Equipped with a built-in rechargeable battery backup, this wattmeter power analyzer can retain data for up to 90 days during power outages or when unplugged. All data, including cost settings, will reset to zero only when the reset button is pressed. Portability and Single Outlet Design: The compact size of this power meter outlet allows it to be plugged into the top socket, leaving the lower outlet accessible. Made from high-quality, fire-resistant material. Includes friendly after-sales customer service and a 1-year limited warranty. Note: Not compatible with AC inverters and solar inverters. Dual Voltage Wide Measurement Range: This power monitor meter can measure 110-130 Vac and 200-240 Vac voltage, 0-16A AMP, 0-3680W watts, and indicates overload when the load reaches 3680W. Class 1.0 accuracy standard with 0.1W, 0.1V, 0.001A, and 0.0001kWh resolution. Note: Range due to certification requirements. Specifications: Input Voltage: 230V 50HZ Operating Current: 16A Accuracy Standard: Class 1.0 Power Dissipation: < 0.8W