Feature:1. Circuit Guard: This protector provides overvoltage guard, undervoltage guard, and voltage display (voltage measurement), supports manual adjustment of overvoltage, undervoltage, and overcurrent guard values.2. Main Purpose: Can prevent the frequent on off of unstable voltage from causing additional damage to electrical devices. With delayed power on function, after the voltage stabilizes for 1500s, it automatically restores power supply.3. Clear Display: This smart protective device provides voltage, current, and KWH displays, ensuring clear and intuitive readings, greatly improving operational convenience and work efficiency.4. Multiple Functions: This self resetting overvoltage undervoltage protector has functions such as reset mode selection, fault inquiry, and factory recovery, meeting the needs of more scenarios for use.5. Flame Retardant PC: The voltage protector shell is made of excellent PC material, which is environment friendly, flame retardant, safe and reliable, can be used in various environments, has a long service life.Specification:Item Type: Adjustable Voltage ProtectorMaterial: PCRated Supply Voltage: AC230VOperating Voltage Range: AC140V-300V (single phase)Rated Frequency: 50/60HZOvervoltage (>U) Setting Range: 230-300VUndervoltage (<U) Setting Range: 140-210VKwh Display Range: 0-9999>U and <U Trip Delay: 0.5SReset Start Delay: 1-600SVoltage Measurement Accuracy: 1% (not more than 1% of the total range)Rated Insulation Voltage: 300VOutput Contact: 1NOElectrical Life: 10Mechanical Life: 10IP Level: IP20Pollution Level: 3Altitude: 2000mOperating Temperature: -50-55Humidity: 50% at 40 (non condensing)Storage Temperature: -30-70.Package List:1 x Adjustable Voltage Protector