Features: 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. Descriptions: It can be applied to monitoring voltage of storage battery, mastering voltage state of storage battery, and measuring voltage and current of other devices. It can can display voltage and current at the same time in such a small size. Specifications: 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 Shell color: white Package List: 1 x Multi-functional Meter