Feature: 1. PC Material: Made of PC material, this voltage protective device is flame retardant, impact resistance, weather resistance, and not easy to deform. 2. Safe to Use: With overvoltage protection, undervoltage protection, unstable voltage protection and voltage display functions, this voltage protective device is safer and more reliable to use. 3. Auto Recovery: After the voltage is stable, the voltage protective device will be automatically restored after 1S to 600S. 4. Digital Display: The voltage protective device has a clear screen with 2 data display, so people can also use it as a voltmeter. 5. Adjustable Values: You can manually adjust overvoltage, undervoltage and overcurrent protection values to better defend your devices. 6. Additional Functions: This voltage protective device has the functions of reset mode selection, fault inquiry, and factory reset. Specification: Item Type: Voltage Protective Device Material: PC Flame Retardant Rated Voltage: 230VAC Current: 1-63A Overvoltage Protection Value Range: 230V-300V Undervoltage Protection Value Range: 140V-210V Rated Frequency: 50/60Hz >U and <U Reset, Start Delay: 1s to 600s Error: 2% Voltage Measurement Accuracy: 1% Rated Insulation Voltage: 400V Output Contact: 1No Electric Life: 100000 Times Mechanical Life 1000000 Times Protection Class: IP20 Altitude: Less Than or Equal to 2000m Working Temperature -50℃ to 55℃ Humidity: Less Than or Equal to 50% at40℃ (Non Condensing) Humidity Temperature: -30℃ to 70℃. Package List: 1 x Voltage Protective Device