SINOTIMER 220V LED Digital Display Delay Automatic Reset Under-voltage Protector 1. AC rated voltage: AC 230V 5060Hz 2. Through current: up to 40A 3. Recovery time: within 60s 4. Function: over-voltagelow voltage protection, voltage display (voltage measurement), automatic recovery 5. Installation: 35mm rail 6. Size: about 7.7x4.5x3.5cm 7. Weight: about 128g Features: 1. Stable performance 2. Easy installation, 35mm rail installation 3. Simple operation 4. When the power supply is normal, the green indicator light is displayed, and when the power supply is over-voltage or under-voltage, the red indicator light is displayed 5. Clear LED display, wide viewing angle, voltage reading can be easily checked at any time 6. Mainly used for over-voltage, under-voltage or over-current protection or single-phase electrical equipment protection in the distribution line of residential household boxes 7. In case of line over-voltage or under-voltage or over-current, the power supply can be cut off instantly to protect the electrical equipment from damage; when the line voltage returns to normal, the protector can automatically turn on the power normally