Description Features: See how much energy equipment is used and how much they cost at a glance. Electricity meters with LCD displays accurately measure the energy consumption of electronic devices in the home and office. This easy-to-use plug-in device automatically calculates energy costs to show you which devices are the most expensive and can help you save money. 2x1.5V (LR44/AG13) coin cell backup battery included technical parameter 1. Rating: 230VAC/50HZ/10A/2300W 2. Voltage range: 200-276V AC, accuracy +/- 1.5% 3. Current range: 0.005-10A, accuracy +/- 2% 4. Measurement power accuracy: +/- 2% 5. Cumulative display range: 0-9999kwh 6. Measurement frequency range: 45-65Hz 7. Internal consumption: 0.5W 8. Operating temperature: 0 to +40 Packing qty:1pcs