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 ProtectorMaterial: PCRated Power Supply Voltage: AC220VOperating Voltage Range: AC80V-400V (single item)Rated Frequency: 50/60HzOvervoltage (> U) Setting Range: 230-300VUndervoltage (< U) Setting Range: 210-140VkWh Protection Value: 1-9999> U And < U Trip Delay: 0.5SReset or Startup Delay: 1-600SVoltage Measurement Accuracy: 2% (not more than 2% of the total range)Rated Insulation Voltage: 400VOutput Contact: 1NOElectrical Life: 100000Mechanical Life: 1000000Protection Level: IP20Pollution Level: 3Altitude: 2000mOperating Temperature: -50-55Humidity: 50% at 40(no condensation)Storage Temperature: -30-70Product Features: 1. Overvoltage protection2. Undervoltage protection3. Voltage display (voltage measurement)4. The overvoltage protection value is adjustable5. The overpressure recovery value is adjustable6. The operation time of overvoltage protection is adjustable7. The undervoltage protection value is adjustable8. The undervoltage recovery value is adjustable9. The operation time of undervoltage protection is adjustable10. The fault recovery delay time is adjustable11. The power on delay time is adjustable12. Reset mode selection13. Query faults14. Restore factory Settings.Package List:1 x Over Under Voltage Protector1 x Instruction