Functioned as being power meter,voltage meter, energy meter, air-conditioner or fridge monitor,helper; CE and ... efficient energyMulti-plug Socket with power meterMeasurement Range: 1. Voltage: 90~150V or 160~280V 2. Power ... : 1 ~ 3000W (Over 2000 W can not be ... 60 minutes to 24 hours to 999 days7. Measurement Accuracy: 1%8. Refresh frequency: ≥ 2 per second Approvals: CE, ...