Accuracy: 1%,2 digits Voltage Range: AC 80-300V/AC 200-450V(choose one type) Current Range: AC 0-100A Cumulative Time: 0-999.59h Active Power Range: 0-30000W Power Factor Range: 1.000-0.000 Electric Energy Range: 0-99999kwh Size: 80 x 53 x 63mm Net Weight: 119.2g The testing accuracy is 1%, 2 digits. Display the AC voltage and power factor by 0.31 inches 4-digit red LED. Display the AC current and cumulative time by 0.31 inches 5-digit red LED. Display the active power , electric energy by 0.31 inches 5-digit green LED. The measurement resolution can change automatically. Only suitable for AC50Hz mains supply.