Features Appliances defence: Prevent additional damage to your electrical appliances from unstable voltage, ensuring secondary defence. High Safety: Built-in overvoltage and undervoltage defence for safer and more reliable use. Value Adjustable: Manually adjust overvoltage, undervoltage, and overcurrent defence values according to your needs. Voltage Display: Clear screen for clear and intuitive voltage value viewing and adjustment, enhancing convenience. Multi Functions: Includes reset mode selection, fault query, and factory reset for added functionality. Features: 1、Appliances defence: This device could prevent your electrical appliances from additional damage due to frequent switching on and off by unstable voltage, achieving secondary defence. 2、High Safety: Built in overvoltage defence and undervoltage defence, this voltage protective device is safer and more reliable to use. 3、Value Adjustable: The overvoltage, undervoltage and overcurrent defence values can be manually adjusted according to your needs. 4、Voltage Display: The protective device is equipped with a clear screen, so you can see the voltage value clearly and intuitively, and adjust it, more convenient. 5、Multi Functions: This voltage protective device has the functions of reset mode selection, fault query, and factory reset. Specification: Item Type: Over Under Voltage Protector Material: PC flame retardant Current: 1-63A Over Voltage defence Value Range (uvo): 240-300V Under Voltage defence Value Range (uve): 140-210V Shutdown Delay Time: 2s (1-300s can be set) Self Recovery defence Delay Time: 30s (1-300s can be set) Rated Frequency: 50/60Hz Error: 2% Voltage Measurement Accuracy: 1% Rated Insulation Voltage: 400V Output touch: 1No Electric Life: 100000 times Mechanical Life: 1000000 times defence Grade: IP20 Altitude: ≤2000m Operating Temperature -50℃ to 55℃ Humidity: ≤50% at 40℃ (non condensing) Humidity Temperature: -30℃ to 70℃ Package List: 1 x Over Under Voltage Protector Package List 1 x Over Under Voltage Protector