Built in Battery: the power consumption meter keeps its data and puts up to 3 months as long as the battery is fully when a power failure occurs.Safe Material The current meter is made of premium abs, heat and corrosion resistant, safe and fireproof, strong and durable, can be sued for long time.Energy and : the power consumption can more accurately monitor the consumption of household appliances and help you reduce electricity bills.Specification:Product Name: Current Meter PlugStandard: EuropeanDimensions: 127 x 6 x 73.3 mm / 5 x 0.24 x 2.89 inches.Measurement of current accuracy: +/- 2%.Measurement accuracy: +/- 2%.Battery: 3.6V Ni- batteryPower supply: 230V AC 50HzMaximum load: 16a, 3680wCurrent: 0.0a-16.0a.Plug Type:EU Plug,it applies to Indonesia, Germany, France, , Italy and so on.Material: ABScolour: WhiteVoltage: AC100-240VPackage Contents:2 MonitorsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.