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. 3. It has a step-down and voltage stabilization function, and the output voltage is adjustable. 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. Input voltage:DC 25-90V Output voltage:DC 2.5-60V (input must be output 3V or more) Output current:50A (MAX) (please increase heat dissipation if the module exceeds 60 degrees) Maximum power:1500W (MAX) Operating frequency:68KHZ Conversion efficiency:up to about 94% (efficiency is related to pressure difference and use environment) Operating temperature:0-85 degrees Celsius Due to different batches, there may be differences in product appearance and printed text, which not affect use. Colour:As Shown Material:PCB Package Contents: 2 converter Only the above package content, other products are not included. Note: Light reflection 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.