Feature Highlights: 1. Premium Materials – Made with electronic-grade components, featuring a nickel-plated surface for oxidation resistance and a pure copper inner conductor for enhanced durability and long-lasting performance. 2. Complete Package – Includes 2 step-up power modules and a DC step-down module equipped with a high-precision potentiometer (turn clockwise to increase output, counterclockwise to decrease). 3. Efficient & Stable – Delivers high efficiency with low ripple and includes a power display. It provides reliable voltage regulation, current limiting, and step-down functionality. 4. Durable Design – Built to be highly reliable, resistant to vibration, and offers excellent electromechanical performance for steady operation over time. 5. Wide Compatibility – Suitable for a variety of applications where the input voltage is higher than the output voltage. It maintains a stable output voltage and limits output current across a broad input range. Ideal for booster voltage stabilizer power supplies, DIY adjustable portable power banks, and booster chargers. Product Details: This 2-in-1 DC-DC buck voltage converter allows adjustable output and is designed for everyday DIY and power supply projects. It combines reliable voltage step-down and regulation with clear power display, making it easy to monitor and adjust. The module is built to resist vibration and ensure consistent performance, whether you're creating a custom mobile power source, charger, or other voltage conversion setups. Specifications: - Material: Electronic accessories, nickel-plated surface (anti-oxidation), pure copper inner conductor - Included: 2 × step-up power modules, 1 × DC step-down module with adjustable potentiometer - Features: High efficiency, low ripple, power display, current limiting, voltage regulation, step-down function - Applications: Buck conversion (input voltage > output voltage), voltage stabilizer power supplies, DIY portable power banks, booster chargers If you have any questions during use, feel free to reach out to us.