The Double USB3.0 A Type Female to Motherboard 20/19 Pin Box Header Slot Adapter provides two internal USB 3.0 A ports through a standard motherboard 20/19pin box header, enabling expanded internal USB connectivity. Key benefits Extends system functionality by adding two internal USB 3.0 A ports for enthusiasts and IT professionals Backwards compatible with USB 2.0 and USB 1.1, so you can continue using existing USB devices while gaining USB 3.0 performance Simple integration into your existing setup by connecting to the motherboard header Ideal for connecting external USB 3.0 devices such as USB adapters to your motherboard and integrating them into your current configuration Compact form factor designed to fit standard motherboard layouts and internal connections Specifications and compatibility Ports: 2 x USB 3.0 A female internal connectors Header interface: 20/19pin box header Compatibility: USB 3.0 with backward compatibility to USB 2.0 and USB 1.1 Use scenarios Custom PC builds: Add two internal USB 3.0 ports for front panel access or internal devices while preserving existing USB connections IT and workstation setups: Connect USB 3.0 devices such as adapters, hubs, or enclosures to the motherboard for easier access and organization System upgrades: Enhance an older motherboard by enabling USB 3.0 functionality without discarding legacy USB devices Notes on installation Connect to a standard 20/19pin motherboard USB header to extend internal USB 3.0 connectivity Provides two internal USB 3.0 Type A female ports for direct connections to compatible devices This adapter delivers two internal USB 3.0 ports while remaining compatible with older USB standards, helping you expand capability without changing your existing setup.