Features Adjustable Protection: Manually adjust overvoltage, undervoltage, and overcurrent protection to safeguard appliances and ensure peace of mind. Stabilized Voltage: Prevents damage from unstable voltage fluctuations, providing secondary protection for appliances. Dual Display Convenience: Features two clear digital displays for easy monitoring and reading. Enhanced Safety: Constructed with PC flame retardant material to greatly improve safety during use. Multi-Functionality: Offers reset mode selection, fault inquiry, and factory settings restoration for added convenience. Specification: Item Type: Over Under Voltage Protective Device Material: Flame retardant PC Current: 63A Overvoltage Protection Value Range (uvo): 240V-300V Undervoltage Protection Value Range (uve): 140V-210V Shutdown Delay Time: 2s (can be set 1-300s) Self Recovery Protection Delay Time: 30s (can be set 1-300s) Rated Frequency: 50/60Hz Error: 2% Voltage Measurement Accuracy: 1% Rated Insulation Voltage: 400V Output Contact: 1No Electrical Life: 100000 times Mechanical Life 1000000 times Protection Grade: IP20 Altitude: ≤2000m Working Temperature: -50℃-55℃ Humidity: ≤50% at 40℃ (non condensing) Humidity Temperature: -30℃-70℃ Package List: 1 x Over Under Voltage Protective Device Package List 1 x Over Under Voltage Protective Device