Solu &reg; 5a 40v 75w Dc-dc Adjustable Step-down Buck Voltage Converter Module Digit Voltme//5a 75w Dc-dc Adjustable Step-down Module with Voltmeter// 75w 5a Adjustable Dc-dc Step-down Charge Module LED Driver with Voltmeter 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 range: 4-38VDC (Note: input voltage not exceeding 38V) Output current: 0-5A,Output power: 75W (MAX) Output voltage range: 1.25-36VDC adjustable.Voltmeter range: 4 to 40V, error 0.1V 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.