Feature: 1. When the single-phase circuit has an undervoltage, when the current is faulty, the line is cut off, and when it returns to normal,temporary power consumption can be reset. 2. This Electric Meter Single Phase Energy KWh Meter has voltage,current ,power, frequency and power factor display to offer convenient use. 3. Electricity energy meter adopts microelectronics and digital processing technology to measure electric energy, accurate and reliable. 4. This ac power meter din rail is built in transformer which can meet the load maximum current 80A.   It can be used in school, market, home, industry, laboratory and other fields.   Attention: This energy meter can only use to measure 50/60HZ AC city electricity. Specification: Features: 【Recovery&Reset Function】When the single-phase circuit has an undervoltage, when the current is faulty, the line is cut off, and when it returns to normal,temporary power consumption can be reset. 【Clear Display】This Electric Meter Single Phase Energy KWh Meter has voltage,current ,power, frequency and power factor display to offer convenient use. 【High Accuracy】Electricity energy meter adopts microelectronics and digital processing technology to measure electric energy, accurate and reliable. 【Multi-field Application】This ac power meteris built in transformer which can meet the load maximum current 80A. It can be used in school, market, home, industry, laboratory and other fields. Attention: This energy meter can only use to measure 50/60HZ AC city electricity. Specifications: Voltage: AC 120V / AC230V (Optional) Display: With Backlight Material: Plastic Model: DDS668 Reference Current: 5~80A Energy: 0.1-99999.9 KWH Environment Temperature: -20~+50℃ / -68~+122℉ Pole Width: 17.5mm/0.69in Package Size:9*7.2*4.3cm / 3.54*2.83*1.69in Package Weight: 128g / 4.5oz Package List: 1 * Energy Meter 4 * Seal Cap 1* User manual Package List: 1 * Energy Meter 4 * Seal Cap 1* User manual