Features: This step up step down power module features a clear LCD display showing real time voltages, current, and power data, and incorporates reverse polarity protections. Offering versatile voltages adjustment from 0.5V to 30V and current regulation up to 4A, it delivers stable power with robust 35W cooling or enhanced 50W dissipation. Utilizing premium 60V 75A and double SS56 Schottky rectifiers for superior performances over common solution. Perfect for laboratory setups, charging lithium batteries without extra diodes, automotive electronics projects, and solar powered systems demanding efficient voltages conversion. Engineered for dependable operating with button controlled ON/OFF switching and stable 3A continuous output (4A), its advanced cooling design ensures consistent performances in demanding applications. Specifications: Component： circuit board Process: Precise welding process to ensuring circuit stability and durability Size 67x48mm Supports voltages up and step-down functions | Constant voltages and constant current output | LCD digital display voltmeter and ammeter to monitor voltages and current changes in real time Practicality: widely used in electronic development, laboratory testing, power management and others Package Includes: (1 piece) Power supply module board note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution