Auto-restoring surge and undervoltage protection devices comply with modular design standards. The product board uses high-quality electronic components for reliable performance. When the power supply is unstable, the protection function is automatically activated. As soon as the voltage exceeds a certain range, it automatically switches off to ensure the safety of electrical devices and personnel. When the power supply returns to normal, the device recharges it within 1 minute. Correct cable mode: output input bottom and top. The green lamp indicates that the power supply is working properly, the red lamp indicates over or under voltage. › See more product details Model: Size: Color: