Feature: 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. Specification: Item Type: Voltage Protector Rated Power Supply Voltage: AC220V (L-N) Rated Power Frequency: 50/60Hz Maximum Load AC Value: 3VA Overvoltage Operation Value: 230V-300V (Factory Default Value: 275V) Undervoltage Operating Value: 140V-210V (Factor: 175V) Over Under Voltage Action Delay: 1-400S Overcurrent Action Delay: 1-30S Lag: 5% (U.I) Power On Delay Reset Time: 1-400S Measurement Error: ≤1% DIN Rail Installation: DIN rail EN/IEC 60715 . Package List: 1 x Voltage Protector1 x User Manual