HQRP Digital Energy Monitor WF-D02A for Measure voltage/Calculating the cost of energy according to the pre-set price of energy plus HQRP UV Meter HQRP&reg; Multifunction Mini-ammeter plus HQRP&reg; UV Chain / UV Health Meter; Measuring Range: 1 - 3000W; 0 - 15A; Electricity cost: 0 - 9,999$; Electricity consumption: 0.0001 - 999.9 kWh; AC Voltage: 160~280v/50hz or 90~150v/60hz; Digital LCD Display; Refresh rate: more than one time per second; 200 days warranty!