describe:Energy Meters A power monitor is a monitoring and test instrument used to determine the power consumption and cost of electricity usage of connected equipment. With this meter, you can determine how much your backup appliances cost, what the power factor is, whether the appliances are actually charging and how long your appliances have been charging.caution:Specifications: 1. Power consumption of Power Meter Monitor: 0.5W - Working voltage: 230VAC2. Frequency display: 50HZ - Working current: maximum 16A - Width voltage range: 230V-250V - Set the power display (watt) to 0W~9999W; but the actual displayed wattage (watt) is 0~3680W3. Timing display range: 0 seconds~9999 days - Voltage display range: 0V~9999V - Current display (Ampere): 0,000A~16,000A4. Frequency display: 0Hz9999Hz5. Price display range: 0.00COST/KWH 99.99COST/KWH6. Total KWh and cost display: 0.000KWh-9999KWh, 0.00COST ---- 9999COST7. 2-pin German plug - Funktionsanzeigepacking list:1 * Counter output power meter