Check the listing for details. 5pcs MP1584 5V Fixed Output 3A DC Step Down Converter Buck Module 4.5-28V Input. Condition: New. Listed at 8.99 USD. 5pcs MP1584 5V Fixed Output 3A DC Step Down Converter Buck Module 4.5-28V Input 5V fixed output non-isolated DC buck voltage regulator, ultra small module 22x17x4mm Great for devices that are designed to run on USB power. Input: 4.5-28V, Output:5V, 3A Peak / 1.5A Sustained Efficiency: Up to 92% (depends on the difference between input and output voltage) This module uses synchronous rectification, the most efficient power conversion available. 1.0MHz Switching Frequency, Product Guarantee We offer a 30 day return policy and a one year warranty. Buy with confidence! Item Location All orders ship from Indianapolis, IN, USA Similar Items 5x Adjustable Output $8.99 Free shipping 5x 3.3V Fixed Output $8.99 Free shipping 10x Mini360 Smallest Buck $9.99 Free shipping 100W Boost w/ Voltmeter $9.99 Free shipping 60W Buck/Boost w/ Constant Current $7.99 Free shipping 5A Buck w/ Voltmeter $7.99 Free shipping 5A Buck w/ Constant Current & Voltmeter $8.99 Free shipping 5A Buck w/ Voltmeter & Digital Control $11.99 Free shipping