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: DDS109L Operating voltage: 100-240V 50/60Hz Operating currcnt: Max 16A Timing display range: 0 second9999days Wattage display (watts) range: 0W9999W Voltagc Display range: 0V9999V Current display (amps) range: 0.000A16.000A Frequency display range: 0Hz9999Hz Minimulll wattage display range: 0.0W9999W Maximum wattage display range: 0.0W9999W Price display range: 0.00/KWH99.99/KWH Total KWh and cost display: 0.000KWH9999KWH, 0.009999 Product size: 140*80*60mm Package Included: 1* Plug-in Power Meter 1* Manual