Features Electrical Appliance Protection: Safeguard your electrical appliances from damage caused by frequent switching and unstable voltage, ensuring their longevity and functionality. Customizable Protection: Easily adjust overvoltage, undervoltage, and overcurrent protection values, providing tailored protection for your devices and equipment. Enhanced Safety Features: Monitor and measure overvoltage and undervoltage levels, offering comprehensive electrical safety and peace of mind. Versatile Functions: Benefit from reset mode selection, fault query, and factory recovery functions, ensuring reliable overvoltage and undervoltage protection for your equipment. Quick Installation: Lightweight and compact design allows for swift and hassle-free installation of this voltage protection device, saving you time and effort. Specification: Item Type: Over Under Voltage Protector Material: Flame retardant PC. Current: 1-40A Over Voltage Protection Value Range uvo: 240V-300V Under Voltage Protection Value Range uve: 140V-210V Shut Down Delay Time: 2s, 1-300s adjustable. Self Recovery Protection Delay Time: 30s, 1-300s adjustable. Rated Frequency: 50/60Hz Error: 2% Voltage Measurement Accuracy: 1% Rated Insulation Voltage: 400V Output contact: 1No Electric Life: 100,000 Times Mechanical Life 1,000,000 Times Protection Grade: IP20 Altitude: ≤ 2000m Operating Temperature: -50 ℃ -55 ℃ Humidity: ≤ 50% at 40 ℃, non condensing. Humidity Temperature: -30℃ - 70℃ Package List: 1 x Over Under Voltage Protector Package List 1 x Over Under Voltage Protector