Built in Battery: The power consumption meter retains its data for up to 3 months during a power failure when the battery is fully charged. Safe Material: The current meter is made of premium ABS, heat and corrosion resistant, safe and fireproof, strong and durable, suitable for long-term use. Energy Monitoring: The power consumption meter accurately monitors the energy usage of household appliances and helps reduce electricity bills. Specification: Product Name: Current Meter Plug Standard: European Dimensions: 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-MH battery Power supply: 230V AC 50Hz Maximum load: 16A, 3680W Current: 0.0A - 16.0A Plug Type: EU Plug, applicable in countries such as Germany, France, Italy, and Indonesia Material: ABS Color: White Voltage: AC 100-240V Package Contents: 2 x Monitors Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. Measurement may vary by +/- 1-3 cm.