Feature:1. Multiple Protection: Digital voltage protector multiple protection functions provide protection for appliances and manually adjust the overvoltage, undervoltage and overcurrent protection values.2. Dual Display: Digital voltage protector adopts dual display voltage, current, intuitive reading, more convenient to use.3. Delayed Power On: Overvoltage undervoltage protector can prevent the frequent on off of unstable voltage from causing additional damage to the appliance, and achieve secondary protection. Delayed power on function, the power supply automatically recovers after 1600S after the voltage is stabilized.4. PC Material And Safe: Using flame retardant PC, this protector is with overvoltage protection, undervoltage protection and voltage display (voltage measurement), the use of more safe and reliable.5. Restore Factory Function: Our under voltage self reset overvoltage protector has the functions of reset mode selection, fault query and factory recovery.Specification:Item Type: Overvoltage Under Voltage ProtectorMaterial: PCRated Frequency: 50 60HZUndervoltage (Lower Than U) Setting Range: 140-210VOver U And Lower Than U Tripping Delay: 0.1-30STransmission Delay Time After Power On And Power Off: 1-600S AdjustableOutput Contact: 1NOElectrical Life: 10Mechanical Life: 10Protection Grade: IP20Pollution Degree: 3Altitude: 2000mWorking Temperature: -50-55Humidity: 50% At 40 (Non Condensing)Storage Temperature: -30-70Features2. Undervoltage Protection 4. Adjustable Overvoltage Protection Value 5. Adjustable Overvoltage Recovery Value6. Overvoltage Protection Action Time Adjustable 7. Adjustable Undervoltage Protection Value8. Adjustable Undervoltage Recovery Value9. Adjustable Undervoltage Protection Action Time10. Fault Recovery Delay Time Adjustable11. Power On Delay Time Adjustable12. Reset Mode Selection 13. Fault Inquiry 14. Restore Factory Settings.Package List:1 x Over Under Voltage Protector