1、INTELLIGENT CHIP: According to the electricity status, the voltage can be set independently to display the current power consumption voltage. 2、GOOD PROTECTION: Protects against induced thunder overvoltage in circuits, suitable for household appliances and similar electrical appliances. 3、MULTIPLE USAGES: Used to limit the amplitude of transient overvoltage, absorb, consume or discharge surge current energy, efficient and practical. 4、DIN RAIL MOUNT: The intelligent voltage protection device is 2P design, with DIN rail installation to ensure stable and reliable structure. 5、DIGITAL DISPLAY: The over undervoltage protector has a digital display screen, which is clear and intuitive, improving detection efficiency. 1 x Voltage Protector1 x User Manual Item Type: Voltage ProtectorRated Power Supply Voltage: AC220V (L-N)Rated Power Frequency: 50/60HzMaximum Load AC Value: 3VAOvervoltage Operation Value: 230V-300V (Factory Default Value: 275V)Undervoltage Operating Value: 140V-210V (Factor: 175V)Over Under Voltage Action Delay: 1-400SOvercurrent Action Delay: 1-30SLag: 5% (U.I)Power On Delay Reset Time: 1-400SMeasurement Error: ≤1%DIN Rail Installation: DIN rail EN/IEC 60715