Features: The MB102 Breadboard Power Supply Module delivers 5V/3.3V double output, featuring USB port for mini microcontroller compatibility. Enabling plug and play operation without complex wiring for electronics prototyping. Ideal for enthusiasts, and developers, or devices requiring stable power solution Perfect for classroom experiments, home automation projects, and portable electronic testing setups where space efficient power management is critical. With circuit protective ensuring safe operation across projects while maintaining compatibility with most breadboards and microcontroller. Specifications: Component:Board Type:A/B Size:Approx.52.8x30.1mm/2.07x1.18inch Package Includes: 1Pc Power Supply 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.