Mainly used for the protection of over-voltage, under-voltage or over-current in the incoming line of residential household box or the distribution line which needs to protect single-phase electrical equipment.Its main feature is that the line appears overvoltage or undervoltage, overcurrent status, the product can instantly cut off the power supply, protect the electrical equipment from damage; when the line voltage returns to normal, the protector can automatically and normally turn on the power supply.Functions:1. Overvoltage protection2. Undervoltage protection3. Voltage display (voltage measurement)4. Overvoltage protection value adjustable5. Overvoltage recovery value adjustable6. Overvoltage protection operation time adjustable7. Undervoltage protection value adjustable8. Undervoltage recovery value adjustable9. Undervoltage protection operation time adjustable10. Fault recovery delay time adjustable11. Up-power adjustable,Delay time12. Reset mode selection13. Fault query14. Restore factory settingsSpecifications:Parameters: Voltage 110V, 50/60HzCurrent:40AColour: whiteMaterial: ABS + electronic componentSize: 9.0 cm x 4.0 cm x 5.0 cmPackage Contents:1 * Current limiting protector1 * User ManualOnly the above package content, other products are not included.Note: Light 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.