Solu &reg;Adjustable 90w 4.5-60v to 1.2v-30v Dcdc Step Down Converter Regulator Power Supply// Low Ripple Dc-dc Converter 4.5-60v to 1.2-30v 90w Step-down Power Supply Module//low Ripple 90w Dc 4.5~60v to 1.25~30v Adjustable Voltage Step Down Module About us (Solu ), Professional factory of circuit boards for Arduino, welcome to our store for more choices with best price. What we pursue is your satisfication of our service, not just for our goods.For any reason you are unsatisfied with our product at any time, simply contact support for exchange or refund. we will reply you about any question you ask within 24 hours Input voltage: 4.5-60V ,Output voltage: 1.25-30 adjustable.Have Input Reverse Polarity Protection Output Current: 3A. Can 30V 3A 90W at full load. Please enhance heat dissipation. Usually, you will get it actually in 9~19 days, If you are in the USA and the item is NOT Fulfilled by Amazon. the item will be sent to you by USPS with shipping information from China. The estimated delivery time offered by Amazon is not the real time. Your patience is highly appreciated. Hope you will receive your item soon and enjoy using it. Installation: screw (diameter 3 mm), 2 mounting holes, 2 holes spaced 82mm