Solu 5-36v to 1.25-32v 5a LED Drive Lithium Battery Charger with Voltmeter Ammeter Stable Dcdc Module //5a Cc Cv w/ USB Voltmeter LED Drive Step-down Lithium Charger Power Module// Dc 5a LED Drive Lithium Battery Charger with Voltmeter Ammeter Precise Input voltage range:5-36VDC,Output voltage range:1.25-32VDC adjustable Output current: 0-5A,Output power: 75W.High efficiency up to 96% 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. Input reverse polarity protection: None (if required, high current diode in series with the input). 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