3. It has a step-down and voltage stabilization function, and the output voltage is adjustable. 1. This product is a DC step-down module and cannot be used for AC step-down. 2. The maximum power can reach 1500w. For long-term use, the power should be appropriately reduced. 4. The input voltage must be the output voltage, and there must be a large enough input current to the output voltage is stable. 5. The input voltage is high. Pay attention to the risk of during installation and use, and do a good job of insulation protection., Weight: 0.85318895394 Pounds, Manufacturer: Aisuoka