Features: The 3A Adjustable electricity Regulator Module delivers up to 96% efficiency with 4.5V-28V input, ensuring for power applications. Featuring adjustable output from 3.3V 5V 9V 12V, this adapter integrates overcurrent protective and thermal management for reliable operation. Ideal for engineers, maker, and students, this stepping down power module simplifies prototyping and electronics projects with its user friendly design. The module’s small footprint and output handle demanding loads in space constrained environment. Engineered with advanced heat dissipation, this high efficiency adapter maintains stability under heavy loads without external cooling components. Specifications: Size: Approx.22.5x17mm/0.66x0.88inch Type:3.3V/5V/9V/12V/Adjustable Package Includes: 5Pcs stepping down Module note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.