1、Better Displays: The digital display enables a clear view in the voltage measurement, making the working safe and reliable. 2、Smart Adjusting: Adjustable over and under voltage protection and recovery values, and the action time is also adjustable. 3、Delay Resetting: Supports auto delay reset, both the failure recovery delay time and power on delay time are adjustable. 4、Other Functions: This voltage protector is equipped with reset mode selection, fault inquiry and factory reset functions. 5、Easy to Install: Comes with a light weight and a compact size, the simple installation can be quickly finished in minutes. Item Type: Over Under Voltage Protective Device Material: PC Undervoltage Protection Range: 140V~210V Rated Frequency: 50/60Hz Error: 2% Output Contact: 1No Electric Life: 100000 Times Mechanical Life 1000000 Times Protection Class: IP20 Altitude: ≤2000m Working Remperature -50℃-55℃ Humidity: ≤50% at 40℃, non condensing. Humidity Temperature: -30℃~70℃ 1 x Over Under Voltage Protective Device 1 x User Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.