Features: 1Data Display: This electricity meter can display the measured AC voltage, current, frequency, power, energy and kWh, meanwhile the red and green LEDs are very clear to see. 2High Measurement Accuracy: This single phase electric energy meter uses PC flame retardant materials and accurate chips, which are safe to use. The accuracy is 1% 2 bits, and the measurement speed is 2 times per second. 3Reliable Testing: DIN rail power meter can display AC voltage and current at the same time. If the current is below 100A, simply pass the wire through the hole on the right side of the instrument to obtain AC current. 4Data Storage and Resetting: When the meter displays energy, press and hold the SAM CK key for five seconds, and the meter will reset. Automatically save the electrical energy value and cumulative time electrical energy value when the power is cut off. After reconnecting the measurement power supply, the instrument continues to accumulate data. 5Wide in Utility: This AC power meter has a built in transformer in its guide rail, which can meet the maximum load current of 100A. It can be used in fields such as schools, shopping malls, homes, industry, laboratories, etc. Package included: 1 x Digital Power Meter 1 x User Manual