Features:1. Monitoring electric usage and know cost intuitively: Power consumption meter can measure power (W), volts, amps, frequency, power factor, maximum and minimum power (W), cumulative time and energy (kWh), and calculate cost automatically after price-setting; monitoring home energy usage and help you to save electricity cost.2. Large clear LCD display with backlight: Electricity monitors kilowatt meter has a wide view angle and clear-digit display; easy to read and operate the electricity monitors in dark areas with the backlit clear LCD display.3. Long time data hold memory function: Come with built-in rechargeable battery backup, the watt meter power analyzer can hold data up to 90 days when coming acro a power outage or plugging out the meter from the outlet; all data includes the cost setting will go to zero once pre the reset button.4. Potable and takes up 1 outlet only: Compact size; power meter socket plug leaves the lower wall outlet available when plugging into the upper outlet; made of high-quality fire-resistant material; friendly after-sale customer service and 1-year limited warranty; Note: do not compatible with AC inverter and solar power inverter.5. Dual voltage wide measuring range: This power meter can measure 110-130 Vac &200-240 Vac voltage; 0-16A AMP; 0-3680W wattage, and indicate overload when load up to 3680W; Cla 1.0 accuracy standard with 0.1W, 0.1V, 0.001A and 0.001kWh resolution; Note: Label on watt meter back only shows low volt range due to certification requirements.Specifications:Model: DDS109LOperating voltage: 100-240V 50/60HzOperating currcnt: Max 16ATiming display range: 0 second9999daysWattage display (watts) range: 0W9999WVoltagc Display range: 0V9999VCurrent display (amps) range: 0.000A16.000AFrequency display range: 0Hz9999HzMinimulll wattage display range: 0.0W9999WMaximum wattage display range: 0.0W9999WPrice display range: 0.00/KWH99.99/KWHTotal KWh and cost display: 0.000KWH9999KWH, 0.009999Product size: 140*80*60mmPackage Included:1* Plug-in Power Meter1* Manuala