. Fine workmanship and perfect style. Technical Parameters: Rated power supply voltage: AC220V Working voltage range: AC80-400V (single phase) Working frequency: 50/60Hz Overcurrent setting range: 1-63A Overvoltage setting range: 230-300V Undervoltage setting range: 80-210V Error margin: 2% Protection action delay: 0.5s Reset/start delay: 1s-600s Measurement accuracy: 1% (not to exceed 1% of total range) Insulation voltage: 400V Output contact: 1NO Contact electrical life: 10⁵ Contact mechanical life: 10⁶ Protection level: IP20 Pollution level: 3 Altitude: ≤2000m Operating temperature: -50°C-55°C Humidity: ≤50%at40°C Working temperature: -30°C-70°C Tips: The product may be updated constantly, Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Material: plastic colour: White Package Contents: 1 x Under Voltage Protective Device Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.