Feature: 1. FULL PROTECTION: The shell is made of PC flame retardant material, with overvoltage protection, undervoltage protection and voltage display, making it safer and more reliable to use. 2. INTELLIGENT ADJUSTMENT: To provide safe protection for electrical appliances, manual adjustment of overvoltage, undervoltage, overcurrent protection value. 3. THREE DISPLAY: The voltage protector's screen displays voltage, current, and kWh for more intuitive and convenient readings. 4. MULTIPLE FUNCTIONS: The current protector has the functions of reset mode selection, fault query and factory recovery. 5. PROTECTIVE DEVICE: The protector can prevent the frequent on/off of unstable voltage from causing additional damage to electrical appliances, and achieve secondary protection, and automatically restore power supply after 1 to 600S of voltage stabilization. Specification: Item Type: Over Under Voltage Protector Material: PC Rated Power Supply Voltage: AC220V Operating Voltage Range: AC80V-400V (single item) Rated Frequency: 50/60Hz Overvoltage (> U) Setting Range: 230-300V Undervoltage ( U And < U Trip Delay: 0.5S Reset or Startup Delay: 1-600S Voltage Measurement Accuracy: 2% (not more than 2% of the total range) Rated Insulation Voltage: 400V Output Contact: 1NO Electrical Life: 100000 Mechanical Life: 1000000 Protection Level: IP20 Pollution Level: 3 Altitude: ≤2000m Operating Temperature: -50℃-55℃ Humidity: ≤50% at 40℃(no condensation) Storage Temperature: -30℃-70℃ Product Features: 1. Overvoltage protection 2. Undervoltage protection 3. Voltage display (voltage measurement) 4. The overvoltage protection value is adjustable 5. The overpressure recovery value is adjustable 6. The operation time of overvoltage protection is adjustable 7. The undervoltage protection value is adjustable 8. The undervoltage recovery value is adjustable 9. The operation time of undervoltage protection is adjustable 10. The fault recovery delay time is adjustable 11. The power on delay time is adjustable 12. Reset mode selection 13. Query faults 14. Restore factory Settings. Package List: 1 x Over Under Voltage Protector1 x Instruction