Features HIGH SAFETY Built-in over-voltage protection and low voltage protection, this voltage protection device is safer and more reliable to use. Multiple Functions This voltage protection device has the functions of reset mode selection, fault query, and factory reset. Appliance Protection: This device could prevent your appliances from further damage due to frequent switching on and off by unstable voltage, achieving secondary protection. Adjustable value: Overvoltage, undervoltage and over-current protection values can be adjusted manually according to your needs. Voltage display: the protection device is equipped with a clear display, so that you can see the voltage value clearly and intuitively, and adjust it more conveniently. Specification: Item Type: Surge Protector Material: flame retardant PC Current: 1-63A Overvoltage Protection Value Range (Grape): 240-300V Low Voltage Protection Value Range (uve): 140-210V Shutdown delay time: 2s (can be set from 1 to 300s) Self-recovery protection delay time: 30s (can be set from 1 to 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 Degree of protection: IP20. Altitude: ≤2000m Operating temperature -50°C to 55°C Humidity: ≤50% at 40°C (non-condensing) Humidity Temperature: -30°C to 70°C Package List: 1 x Surge Protector Package List 1 x Over Under Voltage Protector